How can I repeat the line in notepad++?

Question

How can I repeat the line in notepad++ ?

For example I have the following input:

a 01
a 02
a 03
a 04

And I would like it to become:

Answer 1

If you are using windows, I recommend writing an auto-hotkey (AHK) script to do this for you. This way, your special text-manipulation script will work in any IDE, not just notepad++. All you would have to do is copy your text example to the clipboard, and then execute an AHK script that reads data from the clipboard using the %clipboard% variable. Then you can load the clipboard with the results of your script and send a CTRL+V signal.