Fix some deprecation warnings on Python 3.12
Use 'value' instead of 's' attribute to fix deprecation warnings. The
use of 's' generated lots of deprecation warnings when compiled with
mypyc, in particular.
diff --git a/mypy/fastparse.py b/mypy/fastparse.py
index 3f4e2f4..d25236e 100644
--- a/mypy/fastparse.py
+++ b/mypy/fastparse.py
@@ -1881,7 +1881,7 @@
return UnboundType("None", line=self.line)
if isinstance(val, str):
# Parse forward reference.
- return parse_type_string(n.s, "builtins.str", self.line, n.col_offset)
+ return parse_type_string(n.value, "builtins.str", self.line, n.col_offset)
if val is Ellipsis:
# '...' is valid in some types.
return EllipsisType(line=self.line)
