add a blame alias for annotate
The original cvs command was called blame. SVN has both, and other VC systems
typically also have this as an alias. Makes things easier for converts.
Checked out revision 0.
A a
Adding a
Transmitting file data .
Committed revision 1.
% initial roundtrip
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0 added a
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% second roundtrip should do nothing
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% new hg rev
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% echo hg to svn
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0 b
% svn back to hg should do nothing
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% hg back to svn should do nothing
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