107 raw slice return on multiline shape close

// Pins: a bare-return suffix written on a MULTI-LINE shape's closing line is
// judged there and blamed there. `} -> []const u8` is the same wall 510_104
// names, reached by the other of the two spellings, and its diagnostic must
// point at the close line — not at the tor header several lines above it.
//
// The guarded shape is the split between where a construct STARTS and where
// its return type is WRITTEN. The single-line form collapses the two, which
// is why the multi-line form is the one that catches a location taken from
// the declaration rather than from the text at fault.
~tor site {
    id: usize
} -> []const u8