Merge pull request #966 from bor/fix/PLUGINS_example

Fix example (syntax error and indenting).

PLUGINS.md

@@ -57,6 +57,7 @@ how much info to output:
                 msg += " with " + series.data.length + " points";
                 alert(msg);
             }
+        }
 
         plot.hooks.processOptions.push(checkDebugEnabled);
     }