view mercurial/templates/raw/fileannotate.tmpl @ 15976:d1c74c6151c9 stable

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'

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