generated closures should only call() or apply() when necessary.

lib/command.js

@@ -188,10 +188,10 @@
           tag = _e[0];
           value = _e[1];
           return "[" + tag + " " + value + "]";
-        }).call(this));
+        })());
       }
       return _a;
-    }).call(this);
+    })();
     return puts(strings.join(' '));
   };
   // Use the [OptionParser module](optparse.html) to extract all options from