The implementation uses 'ptr' for the name of the first parameter of ctypes.string_at() and ctypes.wstring_at(). Align docs and docstrings with the naming used in the implementation. Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com> Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>