fix(ast_visit): correct and expand comments in Utf8ToUtf16Converter

[overlookmotel]

Fix one inaccurate comment, fix typos, and add a comment about why arithmetic overflow is impossible.

[overlookmotel]

• fix(ast_visit): correct and expand comments in Utf8ToUtf16Converter #13310 👈 (View in Graphite)
• main

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #13310 will not alter performance

_{Comparing 08-26-fix_ast_visit_correct_and_expand_comments_in_utf8toutf16converter_ (1cdc420) with main (45e0cd9)¹}

Summary

✅ 34 untouched benchmarks

Footnotes

1. No successful run was found on main (1cdc420) during the generation of this report, so 45e0cd9 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[Copilot]

Pull Request Overview

This PR fixes and improves comments in the Utf8ToUtf16Converter module by correcting inaccurate documentation, fixing typos, and adding explanatory comments about overflow safety.

• Fixed an inaccurate comment about partition_point behavior
• Corrected spelling errors in variable names within comments
• Added a comment explaining why arithmetic overflow is impossible in the context

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[overlookmotel]

Only affects comments, so merging without review.

[overlookmotel]

Merge activity

• Aug 26, 10:07 AM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Aug 26, 10:07 AM UTC: overlookmotel added this pull request to the Graphite merge queue.
• Aug 26, 10:12 AM UTC: Merged by the Graphite merge queue.