This one may be a bit opinionated...but when a docstring starts with a proper noun that does not start with a capital letter, docformatter is now capitalizing it.

Example:

@pytest.fixture(scope="session", autouse=True)
def client():
-    """qBittorrent Client for testing session."""
+    """QBittorrent Client for testing session."""
    client = Client()

I can imagine other words like iOS, macOS, eBay etc. being affected.

Since detecting whether a word is a proper noun isn't trivial, perhaps detecting if the first word has other capital letters may be sufficient. Alternatively, saying, "wait on #144" may make sense too.