context: add instabilities() method to basefilectx This method is now used in webutils.commonentry(), which adds common data items (commit hash, author, date, etc) for rendering changesets in hgweb. Usually, commonentry() is given a changectx as ctx; but in views related to files (e.g. file view, diff, annotate) it's replaced by a filectx, so the latter also needs to have instabilities() method.

run-test: drop 'execfile' usage for 'common-pattern.py' file This is required for Python 3.

run-test: use byte for 'common-pattern.py' path This is required for Python 3.

templates: reword 'back to filelog' link anchor text This anchor text is problematic in two ways: first, the "back to" part assumes that you got to the page showing it via the filelog. This is not necessarily true, as there are other ways to get to that view besides the filelog view, such as for example following the history of lines from a file. Second, it uses "filelog" jargon, which refers to how each file has its own revlog. This is internal jargon that has no business being exposed to the end user. I just reworded this template to improve understanding.

hgweb: show obsolescence status of a commit As with phases, spartan theme shows a simple "obsolete: yes" on its own line (this allows replacing "yes" with something more useful in future, like output of obsfate* template functions). Everywhere else a new "tag" is added to the same line that has phase, branch, etc of a changeset; in gitweb and monoblue the element has gray background, in paper and coal the element is gray with a dashed underline.

context: add obsolete() method to basefilectx This method is now used in webutils.commonentry(), which adds common data items (commit hash, author, date, etc) for rendering changesets in hgweb. Usually, commonentry() is given a changectx as ctx; but in views related to files (e.g. file view, diff, annotate) it's replaced by a filectx, so the latter also needs to have obsolete() method.

check-code: grep's context flags don't need an extra space before number A bit of useless trivia found while researching this: OpenBSD's grep's -C has a default value (of 2) and disallows space before the argument (while -A and -B allow).

dirstate: make map implementation overridable Other implementations of dirstate will want to replace the class used for the dirstate map. Allow this to happen by making the class an attribute of the dirstate. Differential Revision: https://phab.mercurial-scm.org/D1347

fsmonitor: only access inner dirstate map if it is available As part of the dirstate refactor, fsmonitor was updated to directly access the inner map of the dirstatemap object. Dirstatemap reimplementations may not use a map like this, so only access it if it is there. Differential Revision: https://phab.mercurial-scm.org/D1346

dirstate: add explicit methods for querying directories (API) The set-like object returned by dirstate.dirs may be difficult for other implementations of the dirstate to provide, and is unnecessary as it is only ever used for __contains__. Instead, provide an explicit method for testing for a directory. .. api:: dirstate no longer provides a `dirs()` method. To test for the existence of a directory in the dirstate, use `dirstate.hasdir(dirname)`. Differential Revision: https://phab.mercurial-scm.org/D1345