Drop the ignored hit_box_algorithm="None" from the card game tutorial

[pvcraven]

Summary

The card game tutorial passed hit_box_algorithm="None" to Sprite in 11 files:

super().__init__(self.image_file_name, scale, hit_box_algorithm="None")

That was Arcade 2's way to use the whole image as the hit box instead of calculating one (it was added in 2021 for #814). Sprite now takes its hit box from the texture and accepts **kwargs without checking them, so the argument has silently done nothing. Found while triaging issues; there was no issue for it.

Changes

• The 11 files: the argument is removed from each line. Every edit is on the same line, so the tutorial's line-numbered includes still match.

• The tutorial text: it said "we don't need to go through the time consuming hit box calculation. Therefore we turn that off. Otherwise loading the sprites would take a long time." That's no longer true:

  Hit box	Load all 52 cards	Points (ace of clubs)
  Default (simple)	43 ms	8: the card's outline, with the rounded corners cut
  Bounding box	37 ms	4

  The paragraph now says Arcade works out each card's hit box from its image, and that the tutorial uses it later to find the card the mouse clicks on (get_sprites_at_point).

Not changed

Sprite still silently ignores keyword arguments it doesn't know, which is how this went unnoticed. Making it warn or raise would change behavior for subclasses and user code, so that's a separate decision.

Checks

• solitaire_02, solitaire_07, solitaire_11 and drag_drop_cards_full run.
• The diff changes 11 lines in the code files, one each, and the paragraph in index.rst.

The changelog has an entry under Unreleased → Misc Changes.

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