If the last thing you copied was a line of a block of lines then it will be put between lines. Sample Abbreviations Abbreviations are quite simple word to word translations. Very handy when you type the same things over and over again. It does not matter how many spaces there are between the abbreviation and the expanded word. This allows for some nice formatting.
Abbreviations can be a lot more than mere word substitutons, though.
Actually anything you type can used. Sample Mappings Mappings make the use of VIM more interesting yet. Complex commands be made with just a few keystrokes. This trick makes it possible that the global command works on the last part of the buffer, too. On some keyboards the escape key is not placed place very well.