Mercurial 4.3 release

1. Features

• The experimental sparse extension is now included with Mercurial, but still subject to change.
• hgweb has support for getting history of a section of a file

• Support for Python 2.6 has been dropped. Python 2.7 is now required, with 2.7.9 or later strongly recommended for modern TLS support.

2. Bug fixes

• bundle: add optional 'tagsfnodecache' data to on disk bundle (5543)

• rebase: allow rebase even if some revisions need no rebase (BC) (5422)

• rebase: make sure merge state is cleaned up for no-op rebases (5494)

• diffstat: properly count lines starting in '--' or '++' (5479)

• checklink: degrade gracefully on posix when fs is readonly (5511)

• revset: make hg log -r 'wdir()^' work (4905)

• export: map wctx.node() to 'ff...' node id (5438)

• test-obsolete-bundle-strip: do not include \n in filename (5586)

• streamclone: consider secret changesets (BC) (5589)

• debugcommands: issue warning when repo has secret changesets (5589)

• context: avoid writing outdated dirstate out (5584)

• fsmonitor: write state with wlock held and dirstate unchanged (5581)

• fsmonitor: don't write out state if identity has changed (5581)

• help: clarify ancestors() and descendants() include given set (5594)

• patch: rewrite reversehunks (5337)

• extensions: register functions always at loading extension (5601)

• smartset: fix generatorset.last() to not return the first element (5609)

• revlog: add an experimental option to mitigated delta issues (5480)

• followlines: join merge parents line ranges in blockdescendants() (5595)

• rebase: use scmutil.cleanupnodes (5606) (BC)

• sslutil: check for missing certificate and key files (5598)

• convert: transcode CVS log messages by specified encoding (5597)

• localrepo: cache types for filtered repos (5043)

• zsh_completion: add '--partial' flag to completions for 'import' (5618)

• parsers: fix invariant bug in find_deepest (5623)

• debugignore: eliminate inconsistencies with hg status (5222)

• demandimport: prefer loaded module over package attribute (5617)

• share: share 'cachevfs' with the source clone (5108)

• status: add a flag to terse the output (4119)

3. Improvements

• annotate: new experimental --skip option to skip revs

• color: enable ANSI support on Windows 10
• hgweb: improved styling of gitweb's search form
• hgweb: better followlines UI

• revset: add depth limit to ancestors() and descendants() (5374)

• templater: better handling of template fragments defined in [templates] section

• add ui.tweakdefaults config knob

4. Extensions

• patchbomb: add -B option to select a bookmark

• strip: now phase information is stored in backup bundle
• new experimental "sparse" extension