[docs] [issue18697] Unify arguments names in Unicode object C API documentation

Serhiy Storchaka added the comment: The same issue exists for other types. E.g. PyLong_* functions have Python long argument named as p, obj and pylong, PyFloat_* -- p and pyfloat, PyList_* -- p and list, PyDict_* -- p, a and mapping, PyBytes_* -- o, obj, string and bytes. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue18697> _______________________________________