RE: Strategy to merge an Rev A.a modification into Rev A, B, C .. . sources

[Douglas Finkle]

> Of course, diffing "diff" output makes for an unreadable mess, so
> instead I run both diffs in two xterm windows with the same
> geometry, then flip back and forth between the windows a few
> times quickly, looking for the characters that flicker.  Our
> visual systems are very good at spotting movement :-)

Try using the ediff command within Emacs-- it's excellent for
this, as well as for doing manual file merges.  Each difference
is broken down such that it's color-coded, and can be copied
from one buffer to the other.  There's even a 3-way diff when
things get really nasty-- meta-x ediff-files3 (or buffers3).