Log Message:
Updated py-tortoisehg to 3.9.1.

TortoiseHg 3.9.1

TortoiseHg 3.9.1 is a regularly scheduled bug-fix release.

Bug Fixes

    graphopt: show working copy if any of its parents are in a branch filtering
    sync: reorder SecureDialog.init to avoid too early _updateUi() (fixes #4559)
    toposort: avoid crash when tip revision is hidden