Dmitry Gutov a9ccfaefc1 Change diff-switches default to `-u' ...

Fixes: debbugs:20290

* doc/emacs/files.texi (Comparing Files): Document the new default
value of `diff-switches'.

* doc/emacs/trouble.texi (Sending Patches): Document the preference
for unified diff format.  Escape the plus in the suggested `-F' regexp
value.

* lisp/vc/diff.el (diff-switches): Change the default to `-u'.

2015-04-14 05:06:49 +03:00

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