IS_BLANK_AT      1035 ext/psych/yaml/scanner.c             (CHECK(parser->buffer, '-') && !IS_BLANK_AT(parser->buffer, 1)) ||
IS_BLANK_AT       326 ext/psych/yaml/yaml_private.h #define IS_BLANK(string)    IS_BLANK_AT((string),0)
IS_BLANK_AT       374 ext/psych/yaml/yaml_private.h     (IS_BLANK_AT((string),(offset)) || IS_BREAKZ_AT((string),(offset)))