The shared wrapper treated leading whitespace as a usable word boundary,
pushing a long first token onto a continuation and leaving a numbered blank row.
Only record boundaries after non-whitespace content on the current visual row.
Preserve source whitespace, tab stops, caret rows and paired diff alignment.
Verified: 945 tests, formatting, and live ordinary/split-diff fixture smoke,
including wrap off/on and aligned closing brackets.
Valdemar Lorenzen
hl-valdemar