filemerge: fix crash when using filesets in [partial-merge-tools]
Without this patch, you'd get `mercurial.error.ProgrammingError: fileset
expression with no context`.
# extension to emulate interrupting filemerge._filemerge
from mercurial import (
error,
extensions,
filemerge,
)
def failfilemerge(*args, **kwargs):
raise error.Abort(b"^C")
def extsetup(ui):
extensions.wrapfunction(filemerge, 'filemerge', failfilemerge)