Module line_diff 

Line-level hunk diff — a faithful port of line-diff.ts.

The originals roll their own LCS with a load-bearing tie-break (lcs[i+1][j] >= lcs[i][j+1] ⇒ prefer removed); we port it directly so the emitted op stream matches byte-for-byte. Hunks expand context_lines around each change and merge when adjacent.

Functions

build_line_hunks

Build line-level hunks between two texts, with context_lines of context around each change. Returns an empty vec when the texts are identical.

build_line_hunks_default

Convenience matching the TS default of 3 context lines.