Module Name:	src
Committed By:	ross
Date:		Tue Mar  9 06:31:01 UTC 1999

Modified Files:
	src/share/tmac: doc
Log Message:
Partial .warn cleanup .. if mdoc didn't generate warnings all by
itself, we could do a .warn-enabled sweep of the man pages.
* Mainly, kill strings by redefining them as null instead of using .rm
* Push and pop the warning level around unavoidable trouble spots
* Do all of this only if in groff
* Fix a really obscure bug in .Nm
* Make the .em warning an abort.