title: Inverse of M-q, an unfill-paragraph-function
body: <p>Is there an inverse for <kbd>M-q</kbd>, some kind of <code>unfill-paragraph-function</code>?</p>
  
  <p>If I have undo data, then it's of course easy. What I am asking for is instead the ability to merge lines in a paragraph into a single long line, right after I have just read the file from disk. This would make it possible to then paste the text into a form (a web form and the like) that is expecting a single linebreak for each paragraph.</p>
  
  <p>In the past I have turned off <code>auto-fill</code>, created a macro to delete an EOL and move to the next line, and applied it repeatedly, but this is getting tiring.</p>