pub const HANDOFF_INIT_SEP: char = '\x1f';Expand description
Separator byte for argv/env entries in handoff-init env vars.
ASCII Unit Separator (0x1F). Argv entries and KEY=VAL env pairs
are arbitrary user strings, so the ; separator other MSB_* vars use
is unsafe — they collide with realistic shell input. 0x1F is
purpose-built for this and absent from any printable string.