Tidy up code a bit

Author: sterliakov

mypy/checkexpr.py

@@ -2331,10 +2331,9 @@ def check_argument_count(
                 # Positional argument when expecting a keyword argument.
                 self.msg.too_many_positional_arguments(callee, context)
                 ok = False
-            elif callee.param_spec() is not None:
-                if not formal_to_actual[i]:
-                    self.msg.too_few_arguments(callee, context, actual_names)
-                    ok = False
+            elif callee.param_spec() is not None and not formal_to_actual[i]:
+                self.msg.too_few_arguments(callee, context, actual_names)
+                ok = False
         return ok
 
     def check_for_extra_actual_arguments(

test-data/unit/check-parameter-specification.test

@@ -2283,8 +2283,8 @@ def foo(s: str, s2: str) -> None: ...
 [builtins fixtures/paramspec.pyi]
 
 [case testRunParamSpecOverload]
-from typing_extensions import ParamSpec, Concatenate
-from typing import Callable, overload, NoReturn, TypeVar, Union
+from typing_extensions import ParamSpec
+from typing import Callable, NoReturn, TypeVar, Union, overload
 
 P = ParamSpec("P")
 T = TypeVar("T")