Reword message description.

Co-authored-by: Pierre Sassoulas <[email protected]>

Author: mbyrnepr2

pylint/checkers/typecheck.py

@@ -400,8 +400,7 @@ def _missing_member_hint(
         "Emitted when the second argument of an isinstance call is not a type.",
     ),
     "W1117": (
-        "The keyword argument %r will be added to the keyword variadic "
-        "parameter dictionary %r since it has the same name as a positional-only parameter",
+        "%r will be included in %r since a positional-only parameter with this name already exists",
         "kwarg-superseded-by-positional-arg",
         "Emitted when a function is called with a keyword argument that has the "
         "same name as a positional-only parameter and the function contains a "

tests/functional/k/kwarg_superseded_by_positional_arg.txt

@@ -1,2 +1,2 @@
-kwarg-superseded-by-positional-arg:26:0:26:62::The keyword argument 'apple' will be added to the keyword variadic parameter dictionary '**kwargs' since it has the same name as a positional-only parameter:HIGH
-kwarg-superseded-by-positional-arg:39:0:39:24::The keyword argument 'apple' will be added to the keyword variadic parameter dictionary '**kwargs' since it has the same name as a positional-only parameter:HIGH
+kwarg-superseded-by-positional-arg:26:0:26:62::'apple' will be included in '**kwargs' since a positional-only parameter with this name already exists:HIGH
+kwarg-superseded-by-positional-arg:39:0:39:24::'apple' will be included in '**kwargs' since a positional-only parameter with this name already exists:HIGH