treewide: automatic rewriting of all comment-style type annotations

Performed using https://github.com/ilevkivskyi/com2ann

This has no actual effect on the codebase as type checkers (still)
support both and negligible effect on runtime performance since
__future__ annotations ameliorates that. Technically, the bytecode would
be bigger for non function-local annotations, of which we have many
either way.

So if it doesn't really matter, why do a large-scale refactor? Simple:
because people keep wanting to, but it's getting nickle-and-dimed. If
we're going to do this we might as well do it consistently in one shot,
using tooling that guarantees repeatability and correctness.

Repeat with:

```
com2ann mesonbuild/
```

1 files changed, 1 insertions, 1 deletions

diff --git a/mesonbuild/utils/universal.py b/mesonbuild/utils/universal.py
index c1125fbe8..73d4523ae 100644
--- a/mesonbuild/utils/universal.py
+++ b/mesonbuild/utils/universal.py
@@ -1526,7 +1526,7 @@ def Popen_safe_legacy(args: T.List[str], write: T.Optional[str] = None,
                       **kwargs: T.Any) -> T.Tuple['subprocess.Popen[str]', str, str]:
     p = subprocess.Popen(args, universal_newlines=False, close_fds=False,
                          stdin=stdin, stdout=stdout, stderr=stderr, **kwargs)
-    input_ = None  # type: T.Optional[bytes]
+    input_: T.Optional[bytes] = None
     if write is not None:
         input_ = write.encode('utf-8')
     o, e = p.communicate(input_)