pub const LAST_RESULT_VAR_NAME: &str = "ans";Expand description
Identifier for the last-result special variable without the $ sigil.
Change this single constant to rename the binding site-wide (e.g. "ans" → $ans).
The name is reserved (cannot be rebound with let / mut / const). Not user-configurable.
With a positive max_last_result_size, $ans is { last, exit_code, duration, command }.
With size 0, $ans is { exit_code, duration, command } (last omitted). command is
the exact last REPL source (same buffer reedline stores in history). Resolved from
the stack’s last-result slot, not from captured locals — keep capture-discovery
> checks in sync with this being the last special var id.