Fix misplaced U+0313 combining comma above (9828 occurrences, 111 files)

[chrisdrymon]

Summary

Throughout the corpus, the elision apostrophe in forms like ὑπʼ, ἐφʼ, ὑφʼ is encoded as U+0313 COMBINING COMMA ABOVE sitting after the consonant, rather than U+02BC MODIFIER LETTER APOSTROPHE which is the canonical Greek elision marker.

U+0313 is a combining diacritic; it composes with vowels under NFC normalization to produce smooth-breathing precomposed characters (α + ̓ → ἀ). After a consonant it has no valid composition and remains as a dangling combining mark in NFC text, producing strings like ὑπ̓ where the mark is structurally attached to π even though semantically it represents the elided syllable.

The bug is easy to miss because rendering varies by font and platform. Side-by-side comparison:

• Current: ὑπ̓ αὐτοῦ — the U+0313 sits on the π, looking like a smooth breathing on a consonant.
• Fixed: ὑπʼ αὐτοῦ — the U+02BC is a proper Greek elision apostrophe.

Why it matters

• Search and tokenization treat ὑπ̓ as one token (consonant + combining mark) rather than apostrophe-separated. Indexers don't roll the elided form up to lemma ὑπό correctly.
• NFC normalization can't repair this because there is no precomposed consonant + smooth breathing codepoint — the combining mark stays detached.
• Rendering layers that fall back to combining-mark display show a comma floating awkwardly above the π.

This came up while building a search engine over the Perseus / First1KGreek corpora (korakes-ingest) — a parallel PR is going up against PerseusDL/canonical-greekLit for ~864 occurrences there.

Fix

Three-case replacement of U+0313 in invalid positions (i.e., where the preceding character won't NFC-compose with it):

1. Consonant + U+0313 (the elision-marker case, e.g., ὑπ̓ ἐφ̓ ὑφ̓ κατ̓ μετ̓ ἀντ̓): replace U+0313 with U+02BC. Bulk of changes.
2. Already-composed vowel-with-breathing + U+0313 (duplicate-breathing case, e.g., ἐ̓ where the ἐ already carries a smooth breathing): drop the duplicate combining mark.
3. Ano teleia + U+0313: drop the combining mark.

9828 replacements across 111 files.

Test plan

• CI passes
• Spot-check a handful of diffs — every change is U+0313 → U+02BC (mostly) or removal of a stray U+0313
• NFC-normalize affected files post-merge and confirm no information loss

🤖 Generated with Claude Code

[chrisdrymon]

Closing — author found mistakes in the patch and is going to rework it.