Fedora: set Vim as default editor

1. Fedora now ships with Nano as the default editor, unset Nano as default
   • dnf erase nano-default-editor
2. Set Vim as default
   • dnf install vim-default-editor
3. Now: crontab -e will open vim for editing

Install vim-powerline

• dnf install vim-powerline

Replace 2 newline characters with a single return

• % s+\n\n+\r+