ASCII-only rule: 52 docs in breach, ~3,700 characters, invisible because the test never ran

[PipFoweraker]

tests/test_ascii_compliance.py fails on 52 documentation files. The test is
correct; the docs are in breach. It has been invisible because nothing has ever
run the Python test suite -- no workflow invoked pytest, and pytest was not even
in requirements-dev.txt (both fixed alongside this issue).

What it is

The ASCII-only rule is a hard rule (#744, restated in CLAUDE.md): no non-ASCII in
.py/.md/.json/.yaml/.txt/.cfg/.sh. enforce-standards runs --incremental in
pre-commit -- only over the files a commit touches -- so the untouched tree drifted
and nothing measured the total. This is the same accumulation shape already
recorded for black/isort/ruff in tools/check_guard_parity.py.

Measured on main at the time of filing:

$ grep -rhoP '[^\x00-\x7F]' --include="*.md" docs/ *.md | sort | uniq -c | sort -rn | head
   1340  --  (em dash)
   1056  box-drawing horizontal
    526  right arrow
    154  box-drawing vertical
    123  middle dot
     94  section sign
     87  multiplication sign
     82  en dash
     50  box-drawing tee
     41  almost-equal

~3,700 characters. 158 files outside godot/ contain non-ASCII across all the
rule's extensions; the test's own scope (root *.md + docs/**/*.md) accounts for
the 52 failures.

Why this is not a five-minute sed

About 1,056 of them are box-drawing characters inside ASCII diagrams. A blind
transliteration would mangle every diagram it touches. scripts/intelligent_ascii_converter.py
exists and is report-only by default (--apply to write, per #773/PR #849), but
CLAUDE.md records that a careless run of exactly this tool once sprayed
transliterated churn across the tree. The em-dashes, arrows and quotes are
mechanical; the diagrams need a human eye.

Suggested order:

1. The mechanical classes first (em/en dash --, arrows ->, ellipsis ...,
   smart quotes) in their own reviewable commit.
2. The box-drawing diagrams second, redrawn in the house ASCII style
   (+--, |, `), one file at a time.
3. Then re-include the test and delete the --ignore below.

The exclusion to remove when this lands

.github/workflows/enhanced-cicd-pipeline.yml, "Run Test Suite":

python -m pytest tests/ -q --ignore=tests/test_ascii_compliance.py

The step prints why the file is excluded, so the debt is stated on every run
rather than hidden. Removing the --ignore is the definition of done here.

Context

Found while wiring the Python suite into CI for the first time. In the same pass,
67 pygame-era test files were deleted (each byte-identical to a copy already in
archive/legacy-pygame/tests/), which is the decision #1117 has been waiting on
since 2026-08-04. Two of those 67 did not fail loudly -- they caught the
ImportError, printed, and return Falsed, so pytest counted them as 13
passing tests that asserted nothing about a module that does not exist.