-/* If LEXER is positioned at the (pseudo)identifier S, skips it and returns
- true. Otherwise, returns false.
-
- S may consist of an arbitrary number of identifiers, integers, and
- punctuation e.g. "KRUSKAL-WALLIS", "2SLS", or "END INPUT PROGRAM".
- Identifiers may be abbreviated to their first three letters. Currently only
- hyphens, slashes, and equals signs are supported as punctuation (but it
- would be easy to add more).
-
- S must be an ASCII string. */
-bool
-lex_match_phrase (struct lexer *lexer, const char *s)