SCM_CHARSET_BLANK  807 src/char.c                 return Scm_GetStandardCharSet(SCM_CHARSET_BLANK);
SCM_CHARSET_BLANK  873 src/char.c                 MASK_SET(CS(SCM_CHARSET_BLANK), code);
SCM_CHARSET_BLANK  919 src/gauche.h       SCM_CHARSET_BLANK,