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diff: add --inverse option...
diff: add --inverse option Most of the time, one can reverse a diff by swapping the revisions passed with -r but it happens that if you use the global -R, and diff against the tip of the current repo, you can't swap the revisions. One use-case for that is reviewing changes from a bundle before unbundling. One could also pipe the output of `hg diff` to a command line filter that reverses the diff, but that would remove the benefit from color diffs. Therefore, having an option in `hg diff` to reverse a diff is a good thing. The option flag selection was tricky. GNU patch uses -R/--reverse but -R is already used as a global option and --reverse would make --rev ambiguous.

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test-hup
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Matt Mackall
Update tests
r642 #!/bin/sh
Patrick Mezard
tests: Windows compatibility fixes...
r7080 "$TESTDIR/hghave" fifo || exit 80
Matt Mackall
Update tests
r642 hg init
mkfifo p
hg serve --stdio < p &
P=$!
(echo lock; echo addchangegroup; sleep 5) > p &
Q=$!
Sascha Wilde
Some systems are slower ... give 'em some time/
r2529 sleep 3
Matt Mackall
Update tests
r642 kill -HUP $P
Thomas Arendsen Hein
Exit test-hup only after the background process has died....
r2088 wait
Thomas Arendsen Hein
Fix test-hup for different output of ls on at least MacOS X and Solaris 8.
r3918 echo .hg/* .hg/store/*