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.
Add __fish_real_command, which walks all PATH matches for a name and
returns the first that is NOT one of this config's generated wrappers
(identified by the "# <name>-wrapper-version:" marker; grep -I treats
real ELF binaries as no-match so only our text shims are skipped). It
never returns one of our own wrappers, so a caller embedding the result
can't build a shim that recurses into itself.
Use it for the fish-deps status "(Found at ...)" path so paru/yay show
the real binary instead of the ~/.local/bin logging shim.