rb_str_splice    3130 string.c           rb_str_splice(str, beg, len, val);
rb_str_splice    3178 string.c       	rb_str_splice(str, idx, 1, val);
rb_str_splice    3191 string.c       	rb_str_splice(str, beg, str_strlen(indx, 0), val);
rb_str_splice    3199 string.c       		rb_str_splice(str, beg, len, val);
rb_str_splice    3240 string.c       	    rb_str_splice(str, NUM2LONG(argv[0]), NUM2LONG(argv[1]), argv[2]);
rb_str_splice    3278 string.c           rb_str_splice(str, pos, 0, str2);