139 inline block close then branch

// ============================================================================
// Test 210_139: a branch line FOLLOWING an inline block that closes mid-line
//
// `} |> print.blk { chained }` closes the multi-line block and chains an
// inline block on the SAME line. The multi-line gatherer must see the block
// close there (brace depth, not indent heuristics) and leave the next line
// alone. The old indent-only scanner kept gathering — the `| low l` line
// below (containing braces of its own) was swallowed whole: its branch
// header and binding silently DISCARDED, its body chained unconditionally
// onto the block above. The program compiled and printed "low" on the high
// path. Surfaced by the canonical-printer round-trip harness (390_091/092),
// fixed 2026-07-02 by brace-aware gathering (netBraces).
// ============================================================================

~import std/io

~event pick { n: i32 }
| high i32
| low i32

~proc pick|zig {
    if (n > 5) {
        return .{ .high = n };
    }
    return .{ .low = n };
}

~pick(n: 10)
| high h |> std/io:print.blk {
        high {{ h:d }}
    } |> std/io:print.blk { chained }
| low l |> std/io:print.blk { low {{ l:d }} }