docs: write prose without dashes or semicolons

Profiles, the wiki, comments, docstrings, command output and schema descriptions carried em-dashes, clause-joining semicolons, unicode arrows, box-drawing banners and check-mark glyphs. Each sentence was rewritten rather than having its character swapped. Hashes, paths, source_ref values and every cited file:line are unchanged, which a comparison of each parsed profile against the previous revision confirms.

validate_pr comments now say PASS and FAIL in words, and source_ref values in a profile's structured blocks render as code. test_prose_style fails if any of these comes back, in tracked files or in the generated site.

tests/test_casefold_cache.py

@@ -27,7 +27,7 @@ class CasefoldIndexFollowsItsSource(unittest.TestCase):
 
 
 class APrimaryUnderAnotherCasing(unittest.TestCase):
-    """x1 asked for IPLROM.X1; only Recalbox's second md5 sat under that
+    """x1 asked for IPLROM.X1, and only Recalbox's second md5 sat under that
     casing, in .variants/, and it won over iplrom.x1, the dump every
     platform pins, in the same directory."""