fix an incorrect syntax (#246)

jasl · web-flow · commit 7419fd154e2c · 2022-03-22T15:45:40.000+11:00
diff --git a/lib/mini_racer.rb b/lib/mini_racer.rb
@@ -203,7 +203,7 @@ def write_heap_snapshot(file_or_io)
       end
 
       if !(File === f)
-        raise ArgumentError("file_or_io")
+        raise ArgumentError, "file_or_io"
       end
 
       write_heap_snapshot_unsafe(f)
