Replace Multiple Spaces with Single Spaces
Your high-school typing teacher probably told you to put double spaces after the end of each sentence to make your typing "easier to read." Actually, this is a typographical abomination that must be cleaned up before a document is typeset. This option turns any combination of spaces into one space. Warning: If an author has used spaces to do specialized formatting of tables or diagrams, you'll want to use this option with caution.