Subject: groff-1.19 imported
To: None <>
From: Thomas Klausner <>
List: current-users
Date: 07/01/2003 12:06:22
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The import of groff-1.19 is now complete.

For updating from earlier NetBSD/groff combinations, I strongly
recommend using  I added a note to the UPDATING file too,
but I didn't test it.

The major new feature of groff-1.19 (at least, for me) is a much
better mdoc macro set, to cite from the NEWS file:
o The mdoc package has been completely rewritten, using the full power of
  GNU troff to remove limitations of Unix troff (which is no longer
  supported).  Most important changes are:

  . No argument limit
  . Almost all macros are parsed and callable (if it makes sense)
  . `.Brq', `.Bro', `.Brc': brace enclosure macros
  . `.Bd -centered': center lines
  . `.Bl -xwidth <string>': interpret <string> and use the resulting width
  . Support for double-sided printing (-rD1 command line switch)
  . Support for 11pt and 12pt document sizes (-rS11, -rS12 command line

For a list of changes, see the attachment.

SGR output has been disabled in tmac/troffrc.

New NetBSD platforms, releases, and libraries should now be added
to src/gnu/usr.bin/groff/tmac/mdoc.local and src/share/tmac/doc2html
(for HTML output).

If you find any problems, please use send-pr(1).


P.S.: doc2html should probably be updated/rewritten... Ross? :)

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o Input encoding files for latin-9 (a.k.a. latin-0 and ISO 8859-15) and
  latin-2 (ISO 8859-2) have been added.  Example use:

    groff -Tdvi -mlatin9 my_file > my_file.dvi

  You still need proper fonts with the necessary glyphs.  Out of the box,
  the groff package supports latin-9 only for -Tps, -Tdvi, and -Tutf8,
  and latin-2 only for -Tdvi and -Tutf8.

o Composite glyphs are now supported.  To do this, a subset of the Adobe
  Glyph List (AGL) Algorithm as described in

  is used to construct glyph names based on Unicode character codes.  The
  existing groff glyph names are frozen; no glyph names which can't be
  constructed algorithmically will be added in the future.

  The \[...] escape sequence has been extended to specify multiple glyph
  components.  Example:

    \[A ho]

  this accesses a glyph with the name `u0041_0328'.

  Some groff glyphs which are useful as composites map to `wrong' Unicode
  code points.  For example, `ho' maps to U+02DB which is a spacing
  ogonek, whereas a non-spacing ogonek U+0328 is needed for composite
  glyphs.  The new request

    .composite from to

  will change the mapping while a composite glyph name is constructed.
  To make \[A ho] yield the expected result,

    .composite ho u0328

  is needed.  [The new file `composite.tmac' loaded at start-up already
  contains proper calls to `.composite'.]

  Please refer to the info pages of groff and to the groff_char man page
  for more details.

o A new request `fschar' has been added to define font-specific fallback
  characters.  They are searched after the list of fonts declared with the
  `fspecial' request but before the list of fonts declared with `special'.

o Fallback characters defined with `fschar' can be removed with the
  new `rfschar' request.

o A new request `schar' has been added to define global fallback
  characters.  They are searched after the list of fonts declared with the
  `special' request but before the already mounted special fonts.

o In groff versions 1.18 and 1.18.1, \D'f ...' didn't move the current
  point horizontally.  Despite of being silly, this change has been
  reverted for backwards compatibility.  Consequently, the intermediate
  output command `Df' also moves the position horizontally again.

  \D'f ...' is deprecated since it depends on the horizontal resolution of
  the output device (given with the `hor' parameter in the DESC file).
  Use the new \D'Fg ...' escape instead.

o For orthogonality, new \D subcommands to change the fill color are

    \D'Fr ...' (rgb)
    \D'Fc ...' (cmy)
    \D'Fg ...' (gray)
    \D'Fk ...' (cmyk)
    \D'Fd'     (default color)

  The arguments are the same as with the `defcolor' request.  The current
  position is *not* changed.

o The values set with \H and \S are now available in number registers
  \n[.height] and \n[.slant], respectively.

o The `.pe' number register isn't new but hasn't been documented before.
  It is set to 1 during a page ejection caused by the `bp' request.

o The new glyph symbol `tno' is a textual variant of `no'.

o The new glyph symbol `+e' represents U+03F5, GREEK LUNATE EPSILON SYMBOL.
  (Well, it is not really new since it has been previously supported by
  grolj4.)  The mapping for both the dvi and lj4 symbol font has been
  changed accordingly so that Greek small letter epsilon, `*e', has the
  same glyph shape as with other devices.


o The font `freeeuro.pfa' has been added to provide various default glyph
  shapes for `eu' and `Eu'.

o It is now possible to access all glyphs in a Type 1 font, not only 256
  (provided the font file created by afmtodit has proper entries).  grops
  constructs additional encoding vectors on the fly if necessary.

o The paper size is now emitted via the %%DocumentMedia and PageSize
  mechanisms so that it is no longer required to tell `gv' or `ps2pdf'
  about the paper size.  The `broken' flag value 16 omits this feature
  (the used PostScript command `setpagedevice' is a LanguageLevel 2
  extension).  Patch by Egil Kvaleberg <>.

o Non-slanted PostScript metrics have been changed again; they no longer
  contain negative left italic correction values.  This assures correct
  spacing with eqn.


o The font cmtex10 has been added as the special font `SC' to the DVI fonts.
  It is used as a font-specific special font for CW and CWI.

o New options -l and -p to set landscape orientation and the paper size.
  grodvi now emits a `papersize' special which is understood by DVI drivers
  like dvips.

  Consequently, the DESC file should contain a `papersize' keyword.

o The glyph shapes for \[*f] and \[*e] have been exchanged with \[+f] and
  \[+e], respectively, to be in sync with all other devices.

o Glyphs \[HE] and \[DI] have been replaced with \[u2662] and \[u2661],
  respectively, since the former two glyphs have a black (filled) shape
  which grodvi doesn't provide by default (it never has actually).


o The glyphs \[*e] and \[+e] have been exchanged to be in sync with
  all other devices.

o The glyph \[~=] is now called \[|=].  Similar to other devices, \[~=]
  is now another name for glyph \[~~].


o New option `-r'.  It is similar to the -i option except it tells grotty to
  use the `reverse video' attribute to render italic fonts.


o New command `figname' to set the name of a picture's output box in TeX


o The environment variable `REFER' to override the name of the default
  database isn't new but hasn't been documented before.


o New option `-r' to avoid emission of `.lf' lines.

o New option `-t' to emit TeX comment lines (giving current file and the
  line number) instead of `.lf' lines.


o Unencoded glyphs in an AFM file are output also (since grops can now emit
  multiple encoding vectors for a single font).

o New option `-m' to prevent negative left italic correction values.

o The mapping and encoding file together with file `DESC' are now searched
  in the default font directory also.  Please refer to the man page of
  afmtodit for more details.

Macro Packages

o Larry Kollar <> and others made the man macros more

  . New command line options -rFT, -rIN, and -rSN to set the vertical
    location of the footer line, the body text indentation, and the
    sub-subheading indentation.

  . New command line option -rHY (similar to the ms macros) to control

  . New macros `.PT' and `.BT' to print the header and footer strings.
    They can be replaced with a customized version in `man.local'.

  . The string `HF' now holds the typeface to print headings and

  . Similar to the ms macros, the LT register now defaults to LL if not
    explicitly specified on the command line.

o troff's start-up file `troffrc' now includes `papersize.tmac' to set
  the paper size with the command line option `-dpaper=<size>'.

  Possible values for `<size>' are the same as the predefined `papersize'
  values in the DESC file (only lowercase; see the groff_font man page)
  except a7-d7.  An appended `l' (ell) character denotes landscape
  orientation.  Examples: `a4', `c3l', `letterl'.

  Most output drivers need additional command line switches `-p' and
  `-l' to override the default paper length and orientation as set in
  the driver specific DESC file.

  For example, use the following for PS output on A4 paper in landscape

    groff -Tps -dpaper=a4l -P-pa4 -P-l -ms >

VERSION 1.18.1


o The non-slanted PostScript font definition files have been regenerated to
  include left and right italic correction values.  Applying those to a
  glyph (this is, prepending the glyph with `\,' and appending `\/' to the
  glyph) sets the glyph width to the real value given by the horizontal
  bounding box values.  Without those escapes, the advance width for the
  particular glyph is used (which can differ considerably).

  Most users will neither need this feature nor notice a difference in
  existing documents (provided \, and \/ is used as advertised, namely for
  italic fonts only); its main goal is to improve image generation with

  This is an experimental change, and feedback is welcome.


o Added global option `nospaces' to ignore leading and trailing spaces in
  data items.


o The option -w (--linewidth) has been added (similar to other device
  drivers) to set the default line width.


o Support for b-spline and Bezier curves has been added.


o New option `--shell' to select the shell under which groffer shall run.

Macro Packages

o The string `Am' (producing an ampersand) has been added to mdoc for
  compatibility with NetBSD.

o `.IX' is now deprecated for mom; you should use `.IQ' (Indent Quit)

o In mom, new inlines `FWD', `BCK', `UP', and `DOWN' deal with horizontal
  and vertical movements; please refer to contrib/mom/NEWS for more

o New macro ENDNOTES_HDRFTR_CENTER for mom to better control headers.


o The `papersize' keyword in the DESC file now accepts multiple arguments.
  It is scanned from left to the right, and the first valid argument is
  used. This makes it possible to provide a fallback paper size.


    papersize /etc/papersize a4

o A local font directory has been prepended to the default font path; it
  defaults to /usr/local/share/groff/site-font.  Similar to the normal
  font searching process, files must be placed into a devXXX subdirectory,


  for a PostScript font definition file FOO.


*                                                                         *
*                                                                         *


o Color support has been added to troff and pic (and to the device drivers
  grops, grodvi, grotty, and grohtml -- other preprocessors and drivers will
  follow).  A new function `defcolor' defines colors; the escape sequence
  `\m' sets the drawing color, the escape sequence `\M' specifies the
  background color for closed objects created with \D'...' commands. 
  `\m[]' and `\M[]' switch back to the previous color.  `\m' and `\M'
  correspond to the new troff output command sets starting with `m' and
  `DF'.  The device-specific default color is called `default' and can't be

  Use the `color' request to toggle the usage of colors (default is on); the
  read-only register `.color' is 0 if colors are not active, and non-zero

  The old `Df' output command is mapped onto `DFg'; all color output
  commands don't change the current font position (consequently, `Df'
  doesn't either).

  Outputting color can be disabled in troff and groff with the option -c
  (it is always disabled in compatibility mode).  See the section on grotty
  for the GROFF_NO_SGR environment variable also.

  For defining color components as fractions between 0 and 1, a new scaling
  indicator `f' has been introduced: 1f = 65536u.  For testing whether a
  color is defined (with .if and .ie), a new conditional operator `m' is

  More details can be found in the groff_diff.7 manual page and in

o Similar to \m and \M, \f[] switches back to the previous font.  \fP
  (and \f[P]) is still valid for backwards compatibility.

o The new escape \F is the same as `.fam'; \F[] switches back to previous
  family -- \F[P] selects family `P'.

o Two new glyph symbols are available: `eu' is the official Euro symbol;
  `Eu' is a font-specific glyph variant.

o The new glyph symbols `t+-', `tdi', and `tmu' are textual variants of
  `+-', `di', and `mu', respectively.

o Latin-1 character 181 (PS name `mu', Unicode name U+00B5 MICRO SIGN) has
  got the troff glyph name `mc'.

o -Tutf8 is now available on EBCDIC hosts.

o Strings can take arguments, using this syntax: \*[foo arg1 arg2 ...].

    .ds xxx This is a \\$1 test.
    \*[xxx nice]

o It is now possible to have whitespace between the first and second dot (or
  the name of the ending macro) to end a macro definition.  Example:

    .de !
    .de foo
    .  nop Hello, I'm `foo'.
    .  nop I will now define `bar'.
    .  de bar !
    .    nop Hello, I'm `bar'.
    .  !

o `.fn' is a new string-valued register which returns the (internal) real
  font name; styles and families are properly concatenated.

o Three new read/write registers `seconds', `minutes', and `hours' contain
  the current time, set at start-up of troff.  Use the `af' request to
  control their output format.

o The new request `fchar' can be used to provide fallback characters.  It
  has the same syntax as the `char' request; the only difference is that a
  character defined with `.char' hides the glyph with the same name in the
  current font, whereas a character defined with `.fchar' is checked only if
  the particular glyph isn't found in the current font.  This test happens
  before checking special fonts.

o In analogy to the `tmc' request, `.writec' is the same as `.write' but
  doesn't emit a final newline.

o The new request `itc' is a variant of `.it' for which a line interrupted
  with \c counts as one input line.

o Two new requests `ds1' and `as1' which are similar to `ds' and `as' but
  with compatibility mode disabled during expansion of strings defined by

o The syntax of the `substring' request has been changed: The first
  character in a string now has index 0, the last character has index -1.
  Note that this is an incompatible change.

o To emit strings directly to the intermediate output, a new `output'
  request has been added; it is similar to `\!' used at the top level.

o `.hpf' has been extended.  It can now handle most TeX hyphenation
  pattern files without modification.  To do that, the commands \patterns,
  \hyphenation, and \endinput are recognized.  Please refer to groff_diff.7
  for more information.

o `hpfcode' is a new request to provide an input encoding mapping for the
  `hpf' request.

o The new request `hpfa' appends hyphenation patterns (`hpf' replaces
  already existing patterns).

o A new request `ami' (append macro indirect) has been added.  The first and
  second parameter of `ami' are taken from string registers rather than
  directly; this very special request is needed to make `trace.tmac'
  independent from the escape character (which might even be disabled).

o The new request `sizes' is similar to the `sizes' command in DESC files.
  It expects the same syntax; the data must be on a single line, and the
  final `0' can be omitted.

o `trin' (translate input) is a new request which is similar to `tr' with
  the exception that the `asciify' request will use the character code (if
  any) before the character translation.  Example:

    .trin ax
    .di xxx
    .trin aa
    .asciify xxx

  The result is `x a'.  Using `tr', the result would be `x x'.

o The request `pvs' isn't new, but hasn't been documented before.  It
  adds vertical space after a line has been output.  This makes it an
  alternative to the `ls' request to produce double-spaced documents.
  The read-only register `.pvs' holds the current amount of the
  post-vertical line space.

o For compatibility with plan 9's troff, multiple `pi' requests are

    .pi foo
    .pi bar

  is now equivalent to

    .pi foo | bar

o A new escape sequence `\O' is available to disable and enable glyph
  output.  Please see groff_diff.7 and groff.texinfo for more details.

o The escapes `\%', `\&', `\)', and `\:' no longer cause an error in \X;
  they are ignored now.  Additionally `\ ' and `\~' are converted to
  single space characters.

o The default tab distance in nroff mode is now 0.8i to be compatible
  with UNIX troff.

o Using the latin-1 input character 0xAD (soft hyphen) for the `shc'
  request was a bad idea.  Instead, it is now translated to `\%', and
  the default hyphenation character is again \[hy].  Note that the glyph
  \[shc] is not useful for typographic purposes; it only exists to have
  glyph names for all latin-1 characters.

Macro Packages

o Peter Schaffter <> has contributed a new major macro package
  called `mom', mainly for non-scientific writers, which takes care of
  many typographic issues.  It comes with a complete reference (in HTML
  format) and some examples.  `mom' has been designed to format documents
  for PostScript output only.

o Two macros `AT' (AT&T) and `UC' (Univ. of California) have been added to
  the man macros for compatibility with older BSD releases.

o Both the man and mdoc macro packages now use the LL and LT registers for
  setting the line and title length, respectively (similar to those
  registers in the ms macro package).  If not set on the command line or
  in a macro file loaded before the macro package itself, they default to
  78n in nroff mode and 6.5i in troff mode.

o The `-xwidth' specifier in the mdoc macro package has been removed.  Its
  functionality is now integrated directly into `-width'.  Similarly,
  `-column' has been extended to provide this functionality also.

o A new macro `Ex' has been added to the mdoc macro package to document an
  exit status.

o The PSPIC macro has been extended to work with DVI output (`pspic.tmac' is
  now automatically loaded for -Tdvi), using a dvips special to load the EPS

o The trace.tmac package now traces calls to `am' also.  Additionally, it
  works in compatibility mode.

o `troff.1' has been split.  Differences to UNIX troff are now documented
  in the new man page `groff_diff.7'.

o `groff_mwww.7' has been renamed to `groff_www.7'.  The file mwww.tmac
  has been removed.

o `groff_ms.7' has been completely rewritten.  It now contains a complete
  reference to the ms macros.

o `groff_trace.7' documents the trace macro package.

o Changes in www.tmac:

    Note that HTML support is still in alpha change, so it is rather likely
    that both macro names and macro syntax will change.  Some of the macros
    mentioned below aren't really new but haven't been documented properly

    The following macros have been renamed:

        MAILTO     -> MTO
        IMAGE      -> IMG
        LINE       -> HR

    For consistency, the macros `URL', `FTL', and `MTO' now all have the
    address as the first parameter followed by the description.

    By default, grohtml generates links to all section headings at the top
    of the document.  Use the new `LK' macro to specify a different place.

    For specifying the background color and a background image, use the
    new macros `BCL' and `BGIMG', respectively.

    The macro `NHR' has been added; it suppresses the generation of top and
    bottom rules which grohtml emits by default.

    The new macro `HX' determines the cut-off point for automatic link
    generation to headings.

    The image position parameter names in `IMG' have been changed to `-L',
    `-R', and `-C'.

    New macro `PIMG' for inclusion of a PNG image (it will automatically
    convert it into an EPS file if not -Thtml is used).

    New macro `MPIMG' for putting a PNG image into the left or right margin
    (it will automatically convert it into an EPS file if not
    -Thtml is used).

    New macros `HnS', `HnE' to start and end a header line block.

    New macro `DC' to produce dropcap characters.

    New macro `HTL' to generate an HTML title line only but no H1 heading.

    New macros `ULS' and `ULE' to start and end an unordered list.  The new
    macro `LI' inserts a list item.


o The new command line option `-c' disables color output (which is always
  disabled in compatibility mode).


o Two new command line options `-c' and `-C'; the former passes `-c' to
  grotty (switching to the old output scheme); the latter passes `-C' to
  groff (enabling compatibility mode).


o New keywords `color' (or `colour', `colored', `coloured'), `outline' (or
  `outlined'), and `shaded' are available.  `outline' sets the color of the
  outline, `shaded' the fill color, and `color' sets both.  Example:

    circle shaded "green" outline "black" ;

  Filled arrows always use the outline color for filling.

  Color support for TeX output is not implemented yet.


o A new script contributed by Eric S. Raymond <>.  It
  converts a PIC diagram into a cropped image.  Since it uses gs and the PNM
  library, virtually all graphics formats are available for output.


o A new script contributed by Eric S. Raymond <>.  It
  converts an EQN diagram into a cropped image.  Since it uses gs and the PNM
  library, virtually all graphics formats are available for output.


o A new script contributed by Bernd Warken <>.  It displays
  groff files and man pages on X and tty, taking care of most parameters


o Documents using the mom macro package are recognized.


o Color support has been added.

o A new option `-p' is available to select the output paper size.  It has
  the same syntax as the new `papersize' keyword in the DESC file.


o By default, font sizes are now available in the range 5-10000pt, similar
  to PS fonts. If you want the old behaviour (i.e., font sizes at discrete
  values only), insert the following at the start of your document:

    .if '\*[.T]'dvi' \
    .  sizes 500 600 700 800 900 1000 1095 1200 1400 1440 1600 \
             1728 1800 2000 2074 2200 2400 2488 2800 3600

o A new font file HBI (using cmssbxo10; this is slanted sans serif bold
  extended) has been added.

o Two font families are now available: `T' and `H'.

o EC and TC fonts have been integrated.  Use `-mec' (calling the file
  ec.tmac) to switch to them.  Those fonts give a much better coverage of
  the symbols defined by groff than the CM fonts.

  Note that ec.tmac must be called before any language-specific files; it
  doesn't take care of hcode values.

o Color support has been added.  For drawing commands, colors are translated
  to gray values currently.


o Color support has been added, using the SGR (ISO 6429, sometimes called
  ANSI color) escape sequences.

o SGR escape sequences are now used by default for underlining and bold
  printing also, no longer using the backspace character trick.  To revert
  to the old behaviour, use the `-c' switch.

  Note that you have to use the `-R' option of `less' to make SGR escapes
  display correctly.  On the other hand, terminal programs and consoles like
  `xterm' which support SGR sequences natively can directly display the
  output of grotty.  Consequently, the options `-b', `-B', `-u', and `-U'
  work only in combination with `-c' and are ignored silently otherwise.

  For the `man' program, it may be necessary to add the `-R' option of
  `less' to the $PAGER environment variable; alternatively, you can use
  `man's `-P' option (or adapt its configuration file accordingly).  See
  man(1) for more details.

o If the environment variable GROFF_NO_SGR is set, SGR output is disabled,
  reverting to the old behaviour.

o A new special \X'tty: sgr n' has been added; if n is non-zero or missing,
  enable SGR output (the default).

o If the new option `-i' is used (only in SGR mode), grotty sends escape
  sequences to set the italic font attribute instead of the underline
  attribute for italic fonts.  Note that many terminals don't have support
  for this (including xterm).


o Color support for glyphs has been added.

o New option `-h' to select the style of headings in HTML output.

o New option `-b' to set the background colour to white.

o New options `-a' and `-g' to control the number of bits for anti-aliasing
  used for text and graphics, respectively.  Default value is 4; 0 means
  no anti-aliasing.

o groff character/glyph entities now map onto HTML 4 character entities.


o Valid paper sizes are now specified as with the new `papersize' keyword
  in the DESC file.  Specifically, the old custom paper type format
  `custAAAxBBB' is no longer supported.


o A new manual page `ditroff.7' is available.

o The groff texinfo manual will now be installed, together with a bunch
  of examples.

o A new keyword `papersize' has been added to the DESC file format.  Its
  argument is either

  . a predefined paper format (e.g. `A4' or `letter')

  . a file name pointing to a file which must contain a paper size
    specification in its first line (e.g. `/etc/papersize')

  . a custom paper size definition like `35c,4i'

  See groff_font(5) for more details.  This keyword only affects the
  physical dimensions of the output medium; grops, grolj4, and grolbp use it
  currently.  troff completely ignores it.

VERSION 1.17.2

This is major bug-fixing release which should replace 1.17.1.


o The `IMAGE' macro in www.tmac has changed: Now the optional 2nd parameter
  gives the horizontal image location (left, centered, or right), and the
  optional 3rd and 4th parameter the image dimensions.

VERSION 1.17.1

This is mainly a bug-fixing release.


o Two new requests `de1' and `am1' which are similar to `de' and `am' but
  with compatibility mode disabled during expansion of macros defined by

o Added request `brp'.  This is the same as `\p'.

o Similar to other versions of troff, the `ns' request now works in all
  diversions, not only in the top-level one.

o New read-only number register `.ns'.  Returns 1 if in no-space mode,
  0 otherwise.


o Options -p (pic) and -t (tbl) added.

o The environment variable GROFF_BIN_PATH is now checked before PATH for
  finding groff.


o New option `-D dir' to specify a directory in which all images are placed.

o New option `-I stem' to specify an image name stame.  If not given,
  `grohtml-XXX' is used (`XXX' is the process ID).



o `-mFOO' now searches first for `FOO.tmac' and then for `tmac.FOO'.  The
  old behaviour has been changed to overcome problems with platforms which
  have an 8+3 file name limit, and platforms which have other versions of
  troff installed also.  Additionally, all macro files have been renamed
  using the latter scheme to avoid 8+3 name clashes.

o The new environment variable GROFF_BIN_PATH is checked for programs groff
  is calling (preprocessors, troff, and output devices) before PATH.  If not
  set, it defaults to the directory where the groff binary is located.
  Previously, it was PATH only.  The nroff script only uses GROFF_BIN_PATH
  to find the groff binary but passes both the GROFF_BIN_PATH and PATH
  environment variables to groff.


o The mdoc package has been completely rewritten, using the full power of
  GNU troff to remove limitations of Unix troff (which is no longer
  supported).  Most important changes are:

  . No argument limit
  . Almost all macros are parsed and callable (if it makes sense)
  . `.Lb': prints library names
  . `.Nm <punctuation>' now works as expected; `.Nm "" <punctuation>' has
    been withdrawn
  . Updated `.St' command
  . `.Fx': prints FreeBSD
  . `.Ox': prints OpenBSD
  . `.Bsx': prints BSD/OS
  . `.Brq', `.Bro', `.Brc': brace enclosure macros
  . `.Bd -centered': center lines
  . `.Bl -xwidth <string>': interpret <string> and use the resulting width
  . Support for double-sided printing (-rD1 command line switch)
  . Support for 11pt and 12pt document sizes (-rS11, -rS12 command line

  `groff_mdoc.7' replaces `groff_mdoc.samples.7'; it now completely
  documents the mdoc package.

  Great care has been taken to assure backwards compatibility.  If you
  encounter any abnormal results, please report them to

o A new command line option for the `man' macros (similar to the `mdoc'
  package) has been implemented: `-rcR=1' (now the default in nroff mode)
  produces one single, very long page instead of multiple pages.  `-rcR=0'
  deactivates it.

o The `return' request has been added to return immediately from a macro.

o A new request `nop' (no operation) has been added which is similar to
  `if 1'.  For example,

    .if t \{\

  can now be written as

    .if t \{\
    .  nop Hallo!

o `box' and `boxa' are two new requests which behave similarly to `di' and
  `da' but don't include a partially filled line (which is restored after
  ending the diversion).

o The `asciify' request has been extended to `unformat' space characters
  and some other escape sequences also.

  `\ ' is no longer unformatted as a space but remains an unpaddable,
  unbreakable space character.

o The new `unformat' request is similar to `asciify' but only handles space
  characters and tabs specially if the diversion is reread, retaining font
  information.  This makes it possible to reformat diversions; for example
  the following

    .ll 3i
    a01 a02 a03 a04 a05 a06 a07 a08 a09 a10.
    .box box1
    .ev 1
    \f[B]b01 b02 b03 b04 b05 b06 b07 b08 b09 b10.\f[P]
    c01 c02 c03 c04 c05 c06 c07 c08 c09 c10.
    .unformat box1


    a01  a02  a03  a04 a05 a06 a07
    a08 a09 a10.  c01 c02 c03  c04
    c05  c06 c07 c08 c09 c10.  b01
    b02 b03 b04 b05  b06  b07  b08
    b09 b10.

  Without the `unformat' request, space characters are converted to word
  space nodes which are no longer stretchable, and the result would be

    a01  a02  a03  a04 a05 a06 a07
    a08 a09 a10.  c01 c02 c03  c04
    c05  c06 c07 c08 c09 c10.  b01
    b02 b03 b04 b05 b06 b07 b08
    b09 b10.

o The new request `linetabs' controls the `line-tabs' mode.  In line-tabs
  mode, tab distances are computed relative to the (current) output line.
  Otherwise they are taken relative to the input line.  For example, the

    .ds x a\t\c
    .ds y b\t\c
    .ds z c
    .ta 1i 3i


    a         b         c

  In line-tabs mode, the same code gives

    a         b                   c

  The new read-only number register `.linetabs' returns 1 if in line-tabs
  mode, and 0 otherwise.

o Two new requests `tm1' and `tmc' have been added to improve writing
  messages to the terminal.  `tm1' is similar to `tm' but allows leading
  whitespace.  `tmc' is similar to `tm1' but doesn't emit a final newline.

o For compatibility with sqtroff, the request `output' has been added.
  The behaviour is similar to `\!' at the top-level, that is, it directly
  inserts its argument into the intermediate output format.  The syntax
  is similar to .tm1, allowing leading whitespace.

o The new `spreadwarn' request will make troff warn if spaces in an output
  line are widened by a given limit or more.

o Use `warnscale' to change the scaling indicator troff will use for
  warning messages.

o A new request `dei' (define indirect) has been added.  The first and
  second parameter of `dei' are taken from string registers rather than
  directly; this very special request is needed to make `trace.tmac'
  independent from the escape character (which might even be disabled).

o It is now possible to save and restore the escape character with two new
  requests `ecs' and `ecr'.

o The new escape sequence \B'...' is an analogon to `\A': If the string
  within the delimiters is a valid numeric expression, return character `1',
  and `0' otherwise.

o The new escape sequence `\:' inserts a zero-width break point.  This is
  similar to `\%' but without a soft hyphen character.

o The `tr' request can now map characters onto `\~'.

o Calling the `fam' request without an argument switches back to the
  previous font family.

o The new read-only register `.int' is set to a positive value if the last
  output line is interrupted (i.e., if the input line contains `\c').

o The `writem' request is not new, but hasn't been documented before.  This
  is similar to `write' but instead of a string the contents of a given
  macro or string is written to a stream.

o The read/write number register `hp' to get/set the current horizontal
  position relative to the input line isn't new but hasn't been documented
  properly before.

o `\X' and `\Y' are now transparent for end-of-sentence recognition.

o The `cu' request in nroff mode now works as documented (i.e., it
  underlines spaces also).


o The grog script now works in non-compatibility mode also (which is the
  default).  As usual, use the `-C' option to activate compatibility mode.


o A new option `-P' resp. a new environment variable `GROPS_PROLOGUE' has
  been added to select a different prologue file.

o The effect of the former `-mpsnew' option to access more Type 1 characters
  is now the default and no longer available.  To get the old behaviour
  (i.e., emulation of some glyphs by composition) use `-mpsold'.


o For security reasons the following changes have been done:

  . The tmac.safer file has been replaced with a built-in solution; .open,
    .opena, .pso, .sy, and .pi are completely disabled in safer mode (which
    is the default); to enable these requests the `-U' command line flag
    must be used.

  . Files specified with the .mso request or given with the `-m' command
    line option, and hyphenation patterns loaded with `.hpf' are no longer
    searched in the current directory by default (besides the usual tmac
    path).  Instead, the home directory is used.  To add the current
    directory, either use the `-U' or `-M' command line option or set the
    GROFF_TMAC_PATH environment variable to an appropriate value.

  . troffrc, troffrc-end, and eqnrc are neither searched in the current nor
    in the home directory (even if -U is given).  Use -M or GROFF_TMAC_PATH
    to change that.

  . Similarly, the current directory is no longer part of the font path.
    Use the `-F' command line option or the GROFF_FONT_PATH environment
    variable if you really need the current directory.

o groff now installs its data files into /usr/local/share/groff/<version> by
  default, following the GNU standard.  Additionally, a local tmac directory
  (by default /usr/local/share/groff/site-tmac) is scanned before the
  standard tmac directory.  Wrapper files for system-specific macro packages
  (if necessary) are put into /usr/local/lib/groff/site-tmac; this directory
  is searched before the local tmac directory.

o All programs now have option `-v' to show the version number; they exit
  immediately afterwards, following the GNU standards.  Additionally,
  `--version' and `--help' have been added, doing the obvious actions.