help: suggest merge() revset instead of -m/--only-merges Suggested by Dr Rainer Woitok.

tests: update annotate tests to work around simplemerge bug test-annotate.t and test-fastannotate.hg were failing with --pure since 57203e0210f8 (copies: calculate mergecopies() based on pathcopies(), 2019-04-11). It turned out to be because the pure file merge code behaved differently. I'm guessing it's the mdiff.get_matching_blocks() that behaves differently, but I haven't confirmed that. With this content in the base: a a a And this on the local side: a z a And this on the other side: a a a b4 c b6 It produced this conflict: a z a <<<<<<< working copy: b80e3e32f75a - test: c ||||||| base a ======= a b4 c b5 >>>>>>> merge rev: 64afcdf8e29e - test: mergeb I don't care enough about the pure Python code to fix it, so this patch just updates the tests to manually resolve the conflict. Differential Revision: https://phab.mercurial-scm.org/D6351

copies: delete misplaced comment The comment was added in 78d760aa3607 (duplicatecopies: do not mark items not in the dirstate as copies, 2013-03-28). It became misplaced in 3666331164bb (cmdutil: add copy-filtering support to duplicatecopies, 2014-06-07). Then the relevant code was moved far away in 754b5117622f (context: add workingfilectx.markcopied, 2017-10-15). Differential Revision: https://phab.mercurial-scm.org/D6352

phabricator: include branch in the phabread output Depends on D6301 Differential Revision: https://phab.mercurial-scm.org/D6302

phabricator: fallback to reading metadata from diff for phabread Differential Revision: https://phab.mercurial-scm.org/D6301

phabricator: include commit (node) and parent in the local:commits metadata Differential Revision: https://phab.mercurial-scm.org/D6298

copies: remove redundant filtering of ping-pong renames in _chain() We already handle the ping-pong rename case in the filtering step, so there's very little point in doing it in the chaining loop (ping-pong renames are very rare, so I'm not worried about the cost of adding it and then removing it again). Differential Revision: https://phab.mercurial-scm.org/D6344

repair: reword comments that I noticed while working on source formatting I think this is clearer, and one will also keep us from upsetting check-code when other formatting cleanups happen. Differential Revision: https://phab.mercurial-scm.org/D6339

commit: allow --interactive to work again when naming a directory (issue6131)

gendoc: nest command headers under category headers Differential Revision: https://phab.mercurial-scm.org/D6329