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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-diff-copy-depth
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/ tests / test-diff-copy-depth
#!/bin/sh
for i in aaa zzz; do
hg init t
cd t
echo "-- With $i"
touch file
hg add file
hg ci -m "Add"
hg cp file $i
hg ci -m "a -> $i"
hg cp $i other-file
echo "different" >> $i
hg ci -m "$i -> other-file"
hg cp other-file somename
echo "Status":
hg st -C
echo
echo "Diff:"
hg diff -g
echo
cd ..
rm -rf t
done