FA-80260 / Typography line breaking / Member archive

Hanging-indent list labels: column fit boundary · case 05

Words that end exactly at the right edge are wrapped.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Input [label, words, width, hang]. The label starts at column 0; first-line text starts at column hang when label+1 space fits, else right after label plus one space. Continuation lines are indented by hang. Greedy fill with unit spaces measuring absolute columns. Return padded lines.

Why this case matters

Line breaking decides where paragraphs wrap on screen and in print; a wrong decision point shifts every following line.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: column fit boundary	`["\u2022 measure", " kerning grid", " of"]`	`["\u2022 measure kerning", " grid of"]`	Failed

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