Matt Mackall <mpm@selenic.com> [Tue, 24 Jan 2012 17:16:29 -0600] rev 15976
copies: eliminate criss-crosses when chaining
Before the copies refactoring, we declared that if a and b were
present in source and destination, we ignored copies between them. The
refactored code could however report b was a copy of a and vice versa
in a situation where we looked for differences between two identical
changesets that copy a to b.
y
/
x
\
y'