Replace substring `html.replace(old_src, new_src)` with a regex anchored
to <script src="…"> / <link href="…"> attribute values. Inert occurrences
in comments, JSON literals, or unrelated attributes are left alone.
Loud warning (stderr) when zero matches occur — previously the script
silently skipped a typo'd old_src.
Also rewrites <link href> in the same pass so adjacent CSS hashing doesn't
need a follow-up edit.
Tests: tests/test_inject_hashed_filenames.py covers happy path (both quote
styles, extra attributes), inert-substring cases (comment, JSON literal,
data-attr, anchor href), and link-href rewriting.
Closes#3
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Uwe Schuster
b3b2903c75