Change unicode quotes with ASCII quotes (#2188)

Author: cool-RR

pep-0613.rst

@@ -58,7 +58,7 @@ cannot be used as a return annotation because it is not a valid type.
 
 ::
 
-  MyType: TypeAlias = “ClassName”
+  MyType: TypeAlias = "ClassName"
   def foo() -> MyType: ...
 
 Explicit aliases remove ambiguity so neither of the above errors will be
@@ -153,7 +153,7 @@ Explicit syntax:
   x: Type[int] = int  # typed global expression
 
   x: TypeAlias = int  # type alias
-  x: TypeAlias = “MyClass”  # type alias
+  x: TypeAlias = "MyClass"  # type alias
 
 
 Note: The examples above illustrate implicit and explicit alias declarations in