Fix typo in `String#setbyte` error message
@@ -29,7 +29,7 @@ mrb_str_setbyte(mrb_state *mrb, mrb_value str)
len = RSTRING_LEN(str);
if (pos < -len || len <= pos)
- mrb_raisef(mrb, E_INDEX_ERROR, "index %S is out of array", mrb_fixnum_value(pos));
+ mrb_raisef(mrb, E_INDEX_ERROR, "index %S out of string", mrb_fixnum_value(pos));
if (pos < 0)
pos += len;
