fix(inline): coalesce subword splits inside long hex literals

[dlyongemallo]

No description provided.

[Copilot]

Pull request overview

This PR improves intraline diff rendering for long hex-like literals (notably git commit hashes) by preventing subword tokenization from fragmenting them into many small tokens, which can produce misleading “partial matches” and noisy highlights when comparing unrelated hashes.

Changes:

• Added a hex-run predicate (is_hex_run) plus constants to detect hash-like single-case hex sequences.
• Added a coalesce_hex_runs() post-pass in tokenize() to merge subword-split hex runs back into a single token.
• Expanded functional tests to cover the tokenization rules and verify hash-only edits render as a single whole-token replacement (including overleaf inline deletions).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
lua/diffview/scene/inline_diff.lua	Adds hex-run detection and a post-tokenization coalescing pass to keep long hex literals atomic for intraline diffing.
lua/diffview/tests/functional/inline_diff_spec.lua	Adds functional tests for tokenize()/is_hex_run() and regression coverage for hash-only JSON edits rendering cleanly.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.