Fix typos: invalide -> invalid; patch from @darashi; close #577

src/class.c

@@ -630,7 +630,7 @@ mrb_get_args(mrb_state *mrb, const char *format, ...)
       }
       break;
     default:
-      mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalide argument specifier %c", c);
+      mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid argument specifier %c", c);
       break;
     }
   }

src/string.c

@@ -2511,7 +2511,7 @@ mrb_cstr_to_inum(mrb_state *mrb, const char *str, int base, int badcheck)
     return mrb_fixnum_value(result);
   }
 bad:
-  mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalide string for number(%s)", str);
+  mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid string for number(%s)", str);
   /* not reached */
   return mrb_fixnum_value(0);
 }
@@ -2621,7 +2621,7 @@ mrb_cstr_to_dbl(mrb_state *mrb, const char * p, int badcheck)
   if (p == end) {
     if (badcheck) {
 bad:
-      mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalide string for float(%s)", p);
+      mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid string for float(%s)", p);
       /* not reached */
     }
     return d;