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, 2 insertions, 2 deletions

diff --git a/mesonbuild/interpreterbase/interpreterbase.py b/mesonbuild/interpreterbase/interpreterbase.py
index d23a23d1f..902f84a45 100644
--- a/mesonbuild/interpreterbase/interpreterbase.py
+++ b/mesonbuild/interpreterbase/interpreterbase.py
@@ -93,12 +93,12 @@ class InterpreterBase:
         self.current_lineno = -1
         # Current node set during a function call. This can be used as location
         # when printing a warning message during a method call.
-        self.current_node = None  # type: mparser.BaseNode
+        self.current_node: mparser.BaseNode = None
         # This is set to `version_string` when this statement is evaluated:
         # meson.version().compare_version(version_string)
         # If it was part of a if-clause, it is used to temporally override the
         # current meson version target within that if-block.
-        self.tmp_meson_version = None # type: T.Optional[str]
+        self.tmp_meson_version: T.Optional[str] = None
 
     def handle_meson_version_from_ast(self, strict: bool = True) -> None:
         # do nothing in an AST interpreter