py3: bytes/unicode dance on __doc__ of cmdalias

alias: reject non-ascii characters in user help/doc strings Since command doc/help texts are passed to i18n.gettext(), they must be ASCII. Otherwise, UnicodeError would be raised.

lfs: respect narrowmatcher when testing to add 'lfs' requirement (issue5794) There's a similar test in lfs.wrapper.convertsink(), but I didn't update that because I don't think that the sink repo in a convert can be narrow. It seems reasonable that a narrow clone of an LFS repo may not necessarily be an LFS repo. The only potential issue is that LFS has a hard requirement for changegroup v3, which that extension enables. The use of treemanifest will enable changegroup v3 in narrow clones, because allsupportedversions() in changegroup.py preserves it when it sees a 'treemanifest' requirement. But I don't see where changegroup v3 is enabled for a flat manifest.

localrepo: make filterpats private (API) I'm not sure why this is available on the public API. AFAICT it isn't used outside of the class. .. api:: localrepo.localrepository.filterpats was renamed to localrepo.localrepository._filterpats. Differential Revision: https://phab.mercurial-scm.org/D2927

narrow: use featuresetupfuncs This is the preferred way to register repo requirements that can be opened because it respects the set of loaded extensions at repo open time. Differential Revision: https://phab.mercurial-scm.org/D2926

localrepo: move featuresetupfuncs out of localrepository class (API) I want to establish an interface for local repositories. featuresetupfuncs is a class attribute and is global/shared across all localrepository instances. Let's move it to a module-level attribute to clarify it isn't part of the local repository interface. .. api:: localrepo.localrepository.featuresetupfuncs has been renamed to localrepo.featuresetupfuncs. Differential Revision: https://phab.mercurial-scm.org/D2925

help: supporting both help and doc for aliases This allows an alias to be definted like: [alias] lj = log -Tjson lj:help = [-r REV] lj:doc = Shows the revision log in JSON format. Differential Revision: https://phab.mercurial-scm.org/D2678

grep: fixes erroneous output of grep in forward order (issue3885) If grep is passed a revset in forwards order via -r , say -r 0:tip Then the output is erroneous. This patch fixes that. The output was wrong because we deleted the last revision key in the matches and when we moved to the next revision we didn't had this to compare the diff. So the pstates dict was always empty and in the SequenceMatcher, to convert and empty pstate to the states dictionary you would always insert. This patch keeps the matches dictionary until the end of this window and clears it at once when this window ends. This solves the above mentioned problem and also do not cause any memory leak.

lfs: move the 'supportedoutgoingversions' handling to changegroup.py This handling already exists here for the narrow extension. We still need to either figure out how to enable changegroup v3 without the extension, or figure out how to let the server detect that the client doesn't have it loaded, and emit a user friendly error[1]. I can't tell if D1944 is the appropriate vehicle for the latter. [1] https://www.mercurial-scm.org/pipermail/mercurial-devel/2018-January/109550.html

obsolete: refactor function for getting obsolete options The function for returning obsolete option values obtains all options, validates, then returns the option that was requested. Let's create a new function to return all obsolete option values so callers needing multiple values can call that. Differential Revision: https://phab.mercurial-scm.org/D2667