tests: update/remove outdated comments in test-copies-chain-merge.t...
tests: update/remove outdated comments in test-copies-chain-merge.t
1b8fd4af3318 fixed the test case but missed updating the comments mentioning the
bug. Thanks for @martinvonz who spotted these outdated comments.
Differential Revision:
https://phab.mercurial-scm.org/D9168