tests: split out tests for unrelated copy source/target into separate file...
tests: split out tests for unrelated copy source/target into separate file
I've realized only recently how many cases there are where a file is
treated differently if it's considered "related" to another file (not
deleted and re-added). I'll add more tests for some of these cases
soon.
Differential Revision:
https://phab.mercurial-scm.org/D6598
