ruby_num_interval_step_size 2379 numeric.c          return ruby_num_interval_step_size(from, to, step, FALSE);
ruby_num_interval_step_size 4606 numeric.c          return ruby_num_interval_step_size(from, RARRAY_AREF(args, 0), INT2FIX(1), FALSE);
ruby_num_interval_step_size 4652 numeric.c          return ruby_num_interval_step_size(from, RARRAY_AREF(args, 0), INT2FIX(-1), FALSE);
ruby_num_interval_step_size  355 range.c        	return ruby_num_interval_step_size(b, e, step, EXCL(range));
ruby_num_interval_step_size  723 range.c        	return ruby_num_interval_step_size(b, e, INT2FIX(1), EXCL(range));