@@ -568,14 +568,14 @@ inspect_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
568568 /* need not to show internal data */
569569 if (RSTRING_PTR (str )[0 ] == '-' ) { /* first element */
570570 RSTRING_PTR (str )[0 ] = '#' ;
571- mrb_str_cat (mrb , str , " " , 1 );
571+ mrb_str_cat_lit (mrb , str , " " );
572572 }
573573 else {
574- mrb_str_cat (mrb , str , ", " , 2 );
574+ mrb_str_cat_lit (mrb , str , ", " );
575575 }
576576 s = mrb_sym2name_len (mrb , sym , & len );
577577 mrb_str_cat (mrb , str , s , len );
578- mrb_str_cat (mrb , str , "=" , 1 );
578+ mrb_str_cat_lit (mrb , str , "=" );
579579 if (mrb_type (v ) == MRB_TT_OBJECT ) {
580580 ins = mrb_any_to_s (mrb , v );
581581 }
@@ -598,11 +598,11 @@ mrb_obj_iv_inspect(mrb_state *mrb, struct RObject *obj)
598598
599599 mrb_str_buf_cat (mrb , str , "-<" , 2 );
600600 mrb_str_cat_cstr (mrb , str , cn );
601- mrb_str_cat (mrb , str , ":" , 1 );
601+ mrb_str_cat_lit (mrb , str , ":" );
602602 mrb_str_concat (mrb , str , mrb_ptr_to_str (mrb , obj ));
603603
604604 iv_foreach (mrb , t , inspect_i , & str );
605- mrb_str_cat (mrb , str , ">" , 1 );
605+ mrb_str_cat_lit (mrb , str , ">" );
606606 return str ;
607607 }
608608 return mrb_any_to_s (mrb , mrb_obj_value (obj ));
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