gh-104050: Argument clinic: misc improvements to type annotation coverage

Tools/clinic/clinic.py

@@ -2640,7 +2640,7 @@ class LandMine:
     # try to access any
     __message__: str
 
-    def __getattribute__(self, name: str):
+    def __getattribute__(self, name: str) -> Any:
         if name in ('__repr__', '__message__'):
             return super().__getattribute__(name)
         # raise RuntimeError(repr(name))
@@ -3896,7 +3896,7 @@ def converter_init(self, *, accept: TypeSet = {buffer}) -> None:
 
         self.format_unit = format_unit
 
-    def cleanup(self):
+    def cleanup(self) -> str:
         name = self.name
         return "".join(["if (", name, ".obj) {\n   PyBuffer_Release(&", name, ");\n}\n"])
 
@@ -4115,7 +4115,7 @@ def __init__(
             self,
             *,
             py_default: str | None = None,
-            **kwargs
+            **kwargs: Any
     ) -> None:
         self.py_default = py_default
         try:
@@ -4493,7 +4493,7 @@ def directive_destination(
             self,
             name: str,
             command: str,
-            *args
+            *args: str
     ) -> None:
         match command:
             case "new":
@@ -4847,12 +4847,13 @@ def state_parameters_start(self, line: str | None) -> None:
         return self.next(self.state_parameter, line)
 
 
-    def to_required(self):
+    def to_required(self) -> None:
         """
         Transition to the "required" parameter state.
         """
         if self.parameter_state is not ParamState.REQUIRED:
             self.parameter_state = ParamState.REQUIRED
+            assert self.function is not None
             for p in self.function.parameters.values():
                 p.group = -p.group
 
@@ -5000,7 +5001,7 @@ def parse_parameter(self, line: str) -> None:
                     # of disallowed ast nodes.
                     class DetectBadNodes(ast.NodeVisitor):
                         bad = False
-                        def bad_node(self, node):
+                        def bad_node(self, node: ast.AST) -> None:
                             self.bad = True
 
                         # inline function call
@@ -5248,7 +5249,9 @@ def state_parameter_docstring_start(self, line: str | None) -> None:
     # every line of the docstring must start with at least F spaces,
     # where F > P.
     # these F spaces will be stripped.
-    def state_parameter_docstring(self, line):
+    def state_parameter_docstring(self, line: str | None) -> None:
+        assert line is not None
+
         stripped = line.strip()
         if stripped.startswith('#'):
             return
@@ -5263,7 +5266,7 @@ def state_parameter_docstring(self, line):
             assert self.indent.depth == 1
             return self.next(self.state_function_docstring, line)
 
-        assert self.function.parameters
+        assert self.function and self.function.parameters
         last_parameter = next(reversed(list(self.function.parameters.values())))
 
         new_docstring = last_parameter.docstring
@@ -5276,7 +5279,10 @@ def state_parameter_docstring(self, line):
         last_parameter.docstring = new_docstring
 
     # the final stanza of the DSL is the docstring.
-    def state_function_docstring(self, line):
+    def state_function_docstring(self, line: str | None) -> None:
+        assert self.function is not None
+        assert line is not None
+
         if self.group:
             fail("Function " + self.function.name + " has a ] without a matching [.")