mq: disable qrecord during histedit (issue5981) qrecord during histedit may lead to deadlock-like situations. qpop will throw an error on called during histedit even after qrecord-ing those changes. This patch makes qrecord to abort on histedit. Differential Revision: https://phab.mercurial-scm.org/D5997

committablectx: move status-related methods closer together The modified()/added()/removed()/deleted() clearly belong very close to status(). I separated them in committablectx by the new p[12]copies() methods. This brings the close again. Sorry about the churn. Differential Revision: https://phab.mercurial-scm.org/D5996

tests: add test for hg-test-mode emacs code This is just coverage for the compilation-mode support, but that was enough of a hassle that I wanted to have it covered somehow. Test methodology is _extremely_ cargo-culted from the test for compilation-mode in emacs, so I still have no idea what I'm doing. Differential Revision: https://phab.mercurial-scm.org/D6003

hghave: add check for GNU emacs Differential Revision: https://phab.mercurial-scm.org/D6002

contrib: also linkify tracebacks in compilation output when using hg-test-mode Differential Revision: https://phab.mercurial-scm.org/D6001

contrib: add compilation-mode linking for our test output These regular expressions will cause compilation-mode buffers in emacs to link to source when there are check-code errors in the output of a .t test. In the true tradition of this file, I also have no idea what I'm doing. Differential Revision: https://phab.mercurial-scm.org/D6000

diff: make sure we output stat even when --git is not passed (issue4037) (BC) Before this patch, `hg diff --stat` will give an empty output. It will not show the stat information. I debugged and found that the underlying code does not return the diff header and due to that, other code paths fails to parse that as a diff. I looked into why we don't return diff headers in quiet mode and found the behavior is from 8f8bb77d560e70bcc95577e4dfa877df18d876ab which does not have any mention about why it is done. We also show the diff headers in git, so I think it's fine showing diff header in normal diff in quiet mode. Differential Revision: https://phab.mercurial-scm.org/D6007

tests: add test to demonstrate issue4037 `hg diff --stat -q --config diff.git=0` does not output anything whereas it should print the stat. This is a quiet old bug dating to 2013 and looking at code I think it exists it since 2005 or when --stat was introduced. The next patch will fix the bug. Differential Revision: https://phab.mercurial-scm.org/D6006