test-http-bad-server: move on test from bytes-count to pattern
This specific test case is now using the new "close when a pattern is seen"
approach compared to the more fragile "that many bytes were sent" approach.
Since such change are still a bit noisy, we split each change in there own
changesets.
Differential Revision: https://phab.mercurial-scm.org/D12060
$ hg init
$ echo This is file a1 > a
$ hg add a
$ hg commit -m "commit #0"
$ ls -A
.hg
a
$ echo This is file b1 > b
$ hg add b
$ hg commit -m "commit #1"
$ hg co 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
B should disappear
$ ls -A
.hg
a