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* src/reader.c (reader): Move %define front-end variable defaults and checking into... (prepare_percent_define_front_end_variables): ... this new function. * src/scan-gram.l (INITIAL): For consistency with string literals, don't store open quote on character literal. It's discarded before returning anyway. (SC_ESCAPED_CHARACTER): Similarly, don't store close quote. Make length test more readable, and make the character stored for an empty literal more obvious while consistent with the previous behavior. * src/symtab.c, src/symtab.h: Rename USER_NUMBER_ALIAS to USER_NUMBER_HAS_STRING_ALIAS throughout. * src/symtab.c (symbol_make_alias): Remove comment from symtab.c that is repeated in symtab.h. Improve argument names to make it clear which side of the symbol-string alias pair is which. (symbol_check_alias_consistency): Improve local variable names for the same purpose. * src/symtab.h (struct symbol): Make comments about aliases clearer. (symbol_make_alias): Improve comments and argument name. * src/output.c (token_definitions_output): Update for rename to USER_NUMBER_HAS_STRING_ALIAS and improve comments about aliases.
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