1 PRINT-BANG INPUT (DISPLAY): 0 + 1 + 2 + 3
2 PRINT-BANG INPUT (DEBUG): TokenStream [
16 span: $DIR/nested-nonterminal-tokens.rs:25:26: 25:27 (#0),
19 span: $DIR/nested-nonterminal-tokens.rs:17:41: 17:43 (#4),
24 span: $DIR/nested-nonterminal-tokens.rs:17:44: 17:45 (#4),
30 span: $DIR/nested-nonterminal-tokens.rs:17:46: 17:47 (#4),
33 span: $DIR/nested-nonterminal-tokens.rs:18:41: 18:43 (#5),
38 span: $DIR/nested-nonterminal-tokens.rs:18:44: 18:45 (#5),
44 span: $DIR/nested-nonterminal-tokens.rs:18:46: 18:47 (#5),
47 span: $DIR/nested-nonterminal-tokens.rs:20:21: 20:23 (#6),
52 span: $DIR/nested-nonterminal-tokens.rs:20:24: 20:25 (#6),
58 span: $DIR/nested-nonterminal-tokens.rs:20:26: 20:27 (#6),