IS_BREAK_AT      2297 ext/psych/yaml/emitter.c                 while (IS_BREAK_AT(string, k)) {
IS_BREAK_AT      3099 ext/psych/yaml/scanner.c                     && IS_BREAK_AT(parser->buffer, 1))
IS_BREAK_AT       344 ext/psych/yaml/yaml_private.h #define IS_BREAK(string)    IS_BREAK_AT((string),0)
IS_BREAK_AT       356 ext/psych/yaml/yaml_private.h     (IS_BREAK_AT((string),(offset)) || IS_Z_AT((string),(offset)))