Multi-line editing on Atom
Notice for windows users:
multiline cursor works using these keys in the following order :
CTRL + ALT +
and ↓, or ↑, or a mouse "Click" any where you need
1. Atom Commands
Select all text (Cmd+A on Mac, Ctrl+A elsewhere), then use the shortcut to “split the selection into lines” (Cmd+Shift+L on Mac, Ctrl+Shift+L elsewhere). Both commands are also available from the command palette.
PS: like many other keyboard shortcuts, these also work in Sublime Text
2. RegEx Search & Replace
Search for ^(.*)$
and replace with "$1",
.