Fix stray space before punctuation andword in number_to_words

[gaoflow]

Fixes #229.

number_to_words(541140, andword=",") produced five hundred, forty-one thousand, one hundred , forty with a stray space before the final comma. The same happens for any number whose last group has trailing tens or units, for example number_to_words(140, andword=",") gave one hundred , forty.

Cause

In _handle_chunk, the code first runs WHITESPACES_COMMA.sub(",", chunk) to drop any space before a comma. The later COMMA_WORD.sub(f" {andword} \\1", chunk) then re-introduces a leading space through its space-padded template. With a word andword (the default "and") those surrounding spaces are correct, but with a punctuation andword such as "," the leading space is wrong.

Fix

Re-apply the existing WHITESPACES_COMMA cleanup immediately after the COMMA_WORD substitution, scoped to the branch that performs it. The default "and" and other word andword values are unchanged.

Verification

• python -m pytest tests/test_pwd.py -k "andword or number_to_words or numwords" -q
• python -m pytest -q (214 passed, 16 xfailed)
• python -m compileall inflect tests
• python -m ruff format --check inflect/init.py tests/test_pwd.py
• git diff --check upstream/main...HEAD

Note: python -m ruff check inflect/__init__.py tests/test_pwd.py currently reports pre-existing UP006/UP007/UP035 modernization diagnostics across inflect/__init__.py unrelated to this change.

Disclosure: I prepared this fix with AI assistance under my direction; I reviewed and verified the change and tests myself.