diff hgext/bookflow.py @ 51863:f4733654f144

typing: add `from __future__ import annotations` to most files

Now that py36 is no longer supported, we can postpone annotation evaluation.
This means that the quoting is usually optional (for things imported under the
guard of `if typing.TYPE_CHECKING:` to avoid circular imports), and there's less
overhead on startup[1].

There may be some missing here.  I backed out 6000f5b25c9b (which removed the
`from __future__ import ...` that was supporting py2), reverted the changes in
`contrib/`, `doc/`, and `tests/`, and then ran:

    $ hg status -n --change . | \
        xargs sed -i -e 's/from __future__ import .*$/from __future__ import annotations/'

There were some minor tweaks needed when reviewing (mostly making the spacing
around the import consistent, and `mercurial/testing/__init__.py` had a
multiline import that wasn't fully rewritten.

[1] https://docs.python.org/3/whatsnew/3.7.html#pep-563-postponed-evaluation-of-annotations

--- a/hgext/bookflow.py	Mon Sep 16 15:36:38 2024 +0200
+++ b/hgext/bookflow.py	Mon Sep 16 15:36:44 2024 +0200
@@ -14,6 +14,8 @@
     :hg push -B .: push active bookmark
 """
 
+from __future__ import annotations
+
 from mercurial.i18n import _
 from mercurial import (
     bookmarks,