Merge multiple lines into one using Sublime Text

sublimetext, sublimetext2, sublimetext3

Solution

I think that, in the demo, he presses Del, with the cursor at the end of the line, in multiple selection. This way the `\n` is removed in every selected line.

Problem

I am very new to Sublime Text and I am sure this is a naive question. Watching the Multiple line selection at http://www.sublimetext.com/ (2/6 slide). Absolutely love it. I understand that Ctrl (Cmd)+Shift+L "multiple-selects" so that we could do the edit simultaneously. However, in the demo, they also merge all the lines into 1 single line. What is the shortcut for that? I used Ctrl+J but it just deletes once and not all the occurrences of new line. I use TextPad and use Find/Replace `\n` with an empty space. But it seems that the person giving the demo uses some kind of shortcut.

Original source