narrow: remove narrowpatch instead of narrowcopies
84092edd5c88 removed narrowpatch.py and wanted to drop narrowpatch from
__init__.py but mistakenly removed narrowcopies.
This will make buildbots green again.
Differential Revision: https://phab.mercurial-scm.org/D4837
py3: suppress the output from .write() calls in more tests
I missed these in
803b7569c9ea because I forgot about `...` lines.