I’m sure it’s happened to you just as it has to me. You copy and paste some text in from the web or an email message and it comes in with leading spaces – on evey line. There are lots of ways to remove the problem starting with hitting the delete key way too many times. Stop already!
There is, however one very smart way to do it without getting a repetitive strain injury. Select the lines of text and press Control + E to center the text. With the text still selected press Control + L to left align it and voila! the spaces are gone.