[src/trunk]: src/usr.bin/make Explain that ${VAR:M*} will normalise the inter...

[apb <apb%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/185523fde655
branches:  trunk
changeset: 790896:185523fde655
user:      apb <apb%NetBSD.org@localhost>
date:      Fri Oct 25 22:05:00 2013 +0000

description:
Explain that ${VAR:M*} will normalise the inter-word spacing.

diffstat:

 usr.bin/make/make.1 |  9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diffs (23 lines):

diff -r a41c4eefac28 -r 185523fde655 usr.bin/make/make.1
--- a/usr.bin/make/make.1       Fri Oct 25 21:42:30 2013 +0000
+++ b/usr.bin/make/make.1       Fri Oct 25 22:05:00 2013 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: make.1,v 1.223 2013/10/25 20:57:02 apb Exp $
+.\"    $NetBSD: make.1,v 1.224 2013/10/25 22:05:00 apb Exp $
 .\"
 .\" Copyright (c) 1990, 1993
 .\"    The Regents of the University of California.  All rights reserved.
@@ -1066,6 +1066,13 @@
 be used.
 The wildcard characters may be escaped with a backslash
 .Pq Ql \e .
+As a consequence of the way values are split into words, matched,
+and then joined, a construct like
+.Dl ${VAR:M*}
+will normalise the inter-word spacing, removing all leading and
+trailing space, and converting multiple consecutive spaces
+to single spaces.
+.
 .It Cm \&:N Ns Ar pattern
 This is identical to
 .Ql Cm \&:M ,