run-tests.py: fix the check for the hg installation with -jn (n > 1)
-- With aaaStatus:A somename other-fileDiff:diff --git a/other-file b/somenamecopy from other-filecopy to somename-- With zzzStatus:A somename other-fileDiff:diff --git a/other-file b/somenamecopy from other-filecopy to somename