Last cleanups for release 3.98:

	Last cleanups for release 3.98:
Minor typo and formatting fixes; incorporated most fixes remaining from
filed mail commenting on earlier drafts.

Added warnings: pipes don't work in run command;
	conditions are converse of assertions;
	step over fn without debug info goes to next fn;
	vars may have "wrong" values near fn entrance, exit

Added example from Kingston on printing repeated nonadjacent values

Added explicit mention that in Emacs gdb mode C-c and C-z are like
shell mode for signals

Improved installation directions in appendix, added manual formatting
instructions

Renamed "Stepping and Continuing" to "Continuing and Stepping" so it
doesn't sound so much like its parent "Stopping and Continuing"; also
moved entries on continue to top of section, so they don't get lost.