Since (b) is banned, we should do the same for (a) for consistency.
a) from mercurial import hg
from mercurial.i18n import _
b) from . import hg
from .i18n import _
The motivation for the change from 100 to 95 is included in a comment.
* Updated the tests to include a change to a moved file that still should be
caught as a move.
* Use ui.configint() to non-integer configuration entries more gracefully. Also
complain if a similarity outside of the acceptable range is set.