SHADOWED_TABLE_SUFFIX = '— every option under it falls back to its next source'Tail of the rejection raised when a scalar shadows a whole TOML table.
config_manifest._emit_ranked_diagnostics matches this text to deduplicate the
warning across a full-manifest pass. Both sides must share one constant: a
reworded message that no longer matches would silently restore roughly one
duplicated line per option for a single typo.