typing: explicitly set the return type of `_InnerRevLog.raw_text()` Somewhere between cd72a88c5599 and 2fd44b3dcc33, pytype changed the return type from `Tuple[_T1, Any, bool]` to `Any`. Both are wrong. `mdiff.patches()` is an alias for `mpatch.patches()`, which is selected via module policy (and breaks the ability to infer the types). However, `cext`, `cffi`, and `pure` implementations all agree it returns bytes.

typing: add explicit hints for recent pytype regressions Somewhere between 454feddab720 and cd72a88c5599, pytype changed how it inferred the return type in `extdiff.py` from Tuple[Any, List[Tuple[bytes, Any, os.stat_result]]] to Tuple[Any, List[nothing]] It also changed the return type in `archival.py` from `Any` to `NoReturn`. Fix those up, and also the obvious parameter types while we're here.

revlog: use the method to check if the revlog is being written to This was probably fine, but it could become not fine at some point.