Log Message:
Update to 2.1.2:

This is a regularly-scheduled bugfix release.
    alias: abort on missing positional args (issue3331)
    aliases: use empty string for missing position parameters (issue3331)
    bookmarks: clone non-divergent bookmarks with @ in them
    convert/git: abort if git submodules are detected (issue2150)
    convert: deal with empty splicemap path (issue3311)
    dirstate: avoid normalizing letter case on icasefs for exact match (issue3340)
    dirstate: fix some problems for recursive case normalization (issue3342)
    dirstate: normalize case of directory components
    extdiff: escape filenames with vim/DirDiff and make quoting work with Windows
    filemerge: remove temporary files when using internal:dump as merge-tool
    filemerge: restore default prompt for binary/symlink lost in 83925d3a4559
    icasefs: use case preserved root for 'util.fspath()' invocation (issue3302)
    largefiles: suppress unexpected warning of 'hg status' for removed files
    localrepo: fix unpushable repos when using bookmarks (issue3317)
    merge: accept missing revisions in symlink flag merge (issue3316)
    merge: handle linear update to symlink correctly (issue3316)
    mq: fix qpush --move with comments in series file between applied patches
    qfinish: comply with the phases.new-commit option in secret mode (issue3335)
    rebase: move bookmarks as needed with pull --rebase (issue3285)
    rebase: properly calculate descendant set when aborting (issue3332)
    rename: handle case-changing (issue1717)
    setup.py: don't call splitlines twice on the output of xcodebuild (issue3277)
    strip: enhance repair.strip to receive a list of nodes (issue3299)
    strip: ignore -n (issue3326) (BC)
    wix: add phases help text and two more translations (issue3288)