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.
- Strip leading / from pattern before git check-ignore so root-anchored
patterns like /AGENTS.md are checked as repo-relative paths (AGENTS.md)
and correctly match existing rules — fixes duplicates on every run
- Rework helper to accept multiple patterns and write them as a single
labeled block with project-style header/footer comment rather than
appending bare patterns one at a time
- Move gitignore calls out of per-plug loop in --plugins mode so all
three docs/ patterns are checked and written in one block
- Remove 5 duplicate bare entries left in .gitignore by the broken runs