testrunner: make reading of test times work with #testcases Due to a bug that will be fixed in the next patch, we never actually read back .testcases, so we didn't notice that it could not be parsed successfully when there are #testcases tests. The parsing failed on lines like "test-amend-subrepo.t (case obsstore-off) 32.420" because we used a simple string.split() call and expected all parts but the first to be floating point numbers (and "(case" isn't, for example). Fix by using a regex instead. Differential Revision: https://phab.mercurial-scm.org/D1960