Surfaced while adding the `--- build done ---` delimiter
(commit 2993072). `#run print()` output is buffered by the
interp and flushed via std.debug.print → stderr at
core.zig:187/190; JIT runtime `print()` writes via libc
write(1, ...) → stdout. Same `print` call from the user's
viewpoint, different streams in practice.
Not blocking step 3 — tests capture both streams via 2>&1 so
snapshots are unaffected. Issue file documents the fix path
(move the two `std.debug.print` flushes in core.zig to
stdout-writes) for a future session.
95755be888