rewriteutil: adapt "cannot %s while merging" to work with "change branch of"
`rewriteutil.precheck()` creates error messages by inserting a given
verb into a sentence. The `hg branch -r` command passes in "change
branch of" as the verb. That doesn't work well with "cannot %s while
merging" (making it "cannot change branch of while merging"). Let's
insert a "changeset" there to make it work better.
Building sentences like this seems obviously bad for i18n, but fixing
that is out of scope for this series, IMO.
Differential Revision: https://phab.mercurial-scm.org/D10530
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IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2