fix: correct the stale 'jr is title vocabulary' comment in script_segment

[derek73]

The ASCII-bail comment in nameparser/_pipeline/_script_segment.py, written in #312, said:

period_joined_vocab reads "Smith.Jr." as a title ('jr' is title vocabulary as well as suffix vocabulary), and where position allows, that wins -- "Smith.Jr. Anderson" gives title "Smith.Jr."

#296 later took jr out of TITLES, so both halves are now false. Measured on master (2026-10-02):

• period_joined_vocab("Smith.Jr.", Lexicon.default()) returns "suffix".
• "Smith.Jr. Anderson" gives given Smith.Jr., family Anderson, with no title.
• "John Anderson Smith.Jr." gives suffix Smith.Jr..

The comment now states the verdict and both outcomes, with the measurement date. Per AGENTS.md's rule on stage claims, it doesn't say which stage leaves the leading token as the given name; that wasn't measured. The comment's actual point is unchanged: the ASCII bail returns before any of this reaches the honorific peel.

A sweep of nameparser/, tests/ and docs/ found no other copy of the claim. This was found by a reviewer during #588's docs review.

Comment-only; no behavior change. ruff check passes, as do the script_segment stage tests and test_doc_citations.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.98%. Comparing base (2f7a044) to head (afccc47).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #590   +/-   ##
=======================================
  Coverage   98.98%   98.98%           
=======================================
  Files          45       45           
  Lines        4220     4220           
=======================================
  Hits         4177     4177           
  Misses         43       43           

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