How to combine two lists in one list? using notepad++ regex? : <p>I have a list of textfile such as below example:</p>

<pre><code>username1
username2
username3
</code></pre>

<p>I want a regex that can make it like following example:</p>

<pre><code>username1:username1
username2:username2
username3:username3
</code></pre>

<p>etc..</p>

<p>I've tried many regex with failed attempts.</p>

<p>hopefully somebody can help me..</p>

<p>thank you in advance.
regards.</p>
