tests: avoid the word "dirty" to mean "not a descendant of merge base"...
tests: avoid the word "dirty" to mean "not a descendant of merge base"
The term "dirty" is no longer used in the code since
57203e0210f8
(copies: calculate mergecopies() based on pathcopies(), 2019-04-11).
Differential Revision:
https://phab.mercurial-scm.org/D6373
