title: Add a full stop between user's first and last names
body: <p>I have a spreadsheet where column A contains a list of employee
  first and last names. I want column B to shows the users first and last names but with a "." in between.</p>
  
  <p>Column A currently shows
  dave smith</p>
  
  <p>Column B needs to show
  dave.smith</p>
  
  <p>Can anyone help?</p>