Log Message:
Updated py-tortoisehg to 3.9.

TortoiseHg 3.9

TortoiseHg 3.9 is a quarterly feature release, with many improvements to \ 
performance on large repositories, and security improvements in Mercurial 3.9. \ 
See https://www.mercurial-scm.org/wiki/SecureConnections

Bugs Fixes

    merge: fix missing separator in merge preview output (fixes #4526)
    repofilter: do not emit branchChanged if original branch is restored
    repowatcher: compare st_size and st_ctime to detect changes
    repowidget: add status bar to LightRepoWindow (fixes #4553)
    run: load template functions from extensions (fixes #4515)
    wconfig: patch iniparse to allow :suboption in name

Improvements

    commit: focus on commit message after branch operation (fixes #4442)
    filedata: pass in existing copy information to diff
    fileview: change shortcut keys of parent toggle actions to free Ctrl+n
    icons: doubles the icon sizes on Linux on retina displays (fixes #4493)
    init: relabel "Add special files" to avoid confusion with "hg \ 
add" (fixes #4513)
    repofilter: improve branch drop-down performance
    repomodel: new graph layout algorithm for large repositories
    status: reuse working context in WctxModel
    sync: add widget to select minimum TLS protocol
    workbench: add actions to switch tabs by Ctrl+n key (closes #3543)
    workbench: add shortcut to toggle visibility of task tab

Installer

    updates to mercurial_keyring, evolve, hgsubversion, and hg-git