.gitignore: fix line at end of file
.gitignore: fix line at end of file

This fixes an issue caused where someone opened up .gitignore on the
shell servers, saved, and then quit. Whatever editor used was nice and
added a new line to the end of the file, which is reasonable behavior.
So, I'm committing this change to prevent future errors.

hashbang/shell-etc,hashbang/shell-etc,hashbang/shell-etc,hashbang/shell-etc,hashbang/shell-etc,hashbang/shell-etc,hashbang/shell-etc,hashbang/shell-etc