Format-paragraph was already implemented (Editor::format_paragraph
in src/editor/mod.rs + Alt-P keybind wired in handlers.rs at
0x70 within the Alt-modifier match arm). The function uses
editor::format::reformat_paragraph_at which walks contiguous
non-blank lines and re-flows them at DEFAULT_WRAP_WIDTH (72).
Undoable via begin_undo_group / end_undo_group pair.
This phase adds an end-to-end handler test that exercises the
keybinding path: insert a long paragraph, press Alt-P, verify
the buffer is marked modified. Pre-existing format.rs unit tests
cover the formatting details (wrap widths, blank-line
boundaries, undo); this test verifies the integration.
PLAN.md §15d row 32 marked Done.
Tests: 1154 passed (was 1153, +1). Release binaries build clean.
vasilito
601d08bdc2