**kwargs through super().init, and **d into a Pascal method

Found 2026-10-20 with Vloot's class ModernProgress(tk.Canvas), which calls super().__init__(parent, height=h, bg=bg, highlightthickness=0, **kwargs).

• super()'s argument loop had no star handling: "expected expression" at the **. From the first keyword, when a ** follows, the tail now folds into one mapping (PyParseKwTailIntoMapping) and fills the base's slots by name, as at an ordinary method call.
• **d into ANY Pascal method or constructor whose string parameter has a default crashed in the variant runtime, before the call, even with an empty dict (cv.configure(**d) on a tk.Canvas too). DefaultArgValueNode tags the default literal with the parameter's managed string kind; boxed into the star slot's variant that crashed. PyStarSlotDefault retags it with the plain literal kind first. Both star expanders take it.

Tests: test_nilpy_super_init_forwards_kwargs (CPython output), test_nilpy_double_star_into_a_pascal_method_with_a_string_default.