test-casecollision-merge: fix the test
D30 (
055fee3547df) makes the error message unpredictable, therefore the fix.
Differential Revision: https://phab.mercurial-scm.org/D494
run-tests: make per-line condition support testcase names
7340465bd added multiple test cases support. The latter has a problem -
output lines cannot be made conditional with `#if`:
```
# COUNTEREXAMPLE: DOES NOT WORK
#testcases A B
$ command-foo
common ouput
#if A
A's ouput
#else
B's ouput
#endif
common ouput
```
That's not trivial to fix (even if it works in test, `run-tests.py -i` may
be suboptimal because diff algorithm does not know how to skip the `#if`
lines, even if it does, it may have trouble figuring out whether a changed
line belongs to inside a `#if` block or outside).
Matching output lines conditionally is useful.
4eec2f04a added per-line
condition support for hghave. This patch extends that to also support test
case names.
Differential Revision: https://phab.mercurial-scm.org/D466