test-http-bad-server: align output by using `;`
This is the only message using a `,` instead of `;` and that seems
unintentional. I am unifying the message before unigying the code.
Differential Revision: https://phab.mercurial-scm.org/D12039
https://bz.mercurial-scm.org/1089
$ hg init
$ mkdir a
$ echo a > a/b
$ hg ci -Am m
adding a/b
$ hg rm a
removing a/b
$ hg ci -m m a
$ mkdir a b
$ echo a > a/b
$ hg ci -Am m
adding a/b
$ hg rm a
removing a/b
$ cd b
Relative delete:
$ hg ci -m m ../a
$ cd ..