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    <p>The format of a regular expression can be rather complicated. 
To make sure you didn't miss some slash of quotation mark, place the caret
somewhere in the expression you want to check, and press <span class="shortcut">&shortcut:ShowIntentionActions;</span>. </p>
<p>In the pop-up frame type a string that you think should match your regular expression. If the background turns green, you are lucky. If it turns red, then you have to look for a mistake.         </p>
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        <img src="images/checkRegExp.png"></p>
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