Log Message:
Update to 2.7:

Mercurial 2.7 (2013-08-01)

Regularly scheduled feature release. This release contains an
important fix for a merge ancestor calculation regression in the
2.6 series.

    ancestor: decrement ninteresting correctly (issue3984)
    bookmarks: allow bookmark command to take multiple arguments
    bookmarks: pull --update updates to active bookmark if it moved (issue4007)
    bookmarks: update only proper bookmarks on push -r/-B (issue 3973)
    changegroup: fix fastpath during commit
    checklink: work around sshfs brain-damage (issue3636)
    churn: split email aliases from the right
    commands: add checks for unfinished operations (issue3955)
    commit: enable --secret option
    convert: catch empty origpaths in svn gettags (issue3941)
    convert: fix bad conversion of copies when hg.startrev is specified
    convert: handle changeset sorting errors without traceback (issue3961)
    hgweb: fix incorrect way to count revisions in log (issue3977)
    hgweb: run search instead of showing wrong error for ambigious identifier
    histedit: don't clobber working copy on --abort if not on histedit cset
    histedit: refuse to edit history that contains merges (issue3962)
    import: cut commit messages at --- unconditionally (issue2148)
    largefiles: overridematch() should replace the file path instead of \ 
extending (issue3934)
    log: add a log style that is default+phase (issue3436)
    paper: add line wrapping switch to file source view
    paper: code selection without line numbers in file source view
    paper: highlight line which is linked to in source view
    progress: respect HGPLAIN
    rebase: allow aborting when descendants detected
    rebase: continue abort without strip for immutable csets (issue3997)
    rebase: don't clobber wd on --abort when we've updated away (issue4009)
    revert: make backup when unforgetting a file (issue3423)
    revlog: handle hidden revs in _partialmatch (issue3979)
    rollback: mark as deprecated
    splicemap: improve error handling when parsing (issue2084)
    splicemap: support paths with spaces in splicemap (issue3844)
    sslutil: force SSLv3 on Python 2.6 and later (issue3905)
    summary: augment output with info from extensions
    templater: add strip function with chars as an extra argument
    log: show style list when unknown style specified
    tip: deprecate the tip command
    update: add tracking of interrupted updates (issue3113)
    worker: check problem state correctly (issue3982)
    worker: properly report errors from worker processes (issue3982)