side-data: add a test to check sidedata upgrade
We want to make sure that sidedata computed at commit time and during upgrade
are the same. To do so, we upgrade the repository in `test-copies-chain-merge.t`
since the file is checking all the special case that we need to catch. The
sidedata content in both case should be the same.
Differential Revision: https://phab.mercurial-scm.org/D9124
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true