RETURNS previously conflated fish's $status exit code with genuine
stdout/printed output, e.g. rm listing "0/1" as if they were print
values rather than exit codes. Rename RETURNS to EXIT STATUS across
all 83 documented functions, and reintroduce RETURNS as a distinct
label reserved for the 15 functions that actually print to stdout.
Update build-manual.py's ENTRY_HEADS to render Exit Status before
Returns, manualtools.py's SECTIONS constant, and AGENTS.md's label
order and label-usage guidance to match. Add two verify-manual.py
regression tests: EXIT STATUS bodies must never contain stray
stdout/printed language, and Returns: must always render after
Exit Status: when both are present. Regenerate docs/fish-config.md.
Replace the fish `read` prompt (which showed an unstyled `read>` and left the
prompt line behind on redraw) with an in-place editor built on the raw key
reader. The value is edited directly in its UI field with a block caret; the
panel redraws each keystroke and cleans up on exit. Pre-fills the current value;
Backspace deletes, Enter saves (empty reverts to default), Esc cancels.
- __config_settings_read_key: decode Backspace (bytes 8/127)
- __config_settings_draw_value: edit-mode field with caret + edit hint line
- config-settings: inline edit loop replaces the read-based prompt block