title: single space as field separator with awk
body: <p>I am dealing with a file where fields are separated by a single space.</p>
  
  <p>awk interprets the FS <code>" "</code> as "one or more whitespace", which misreads my file when one of the fields is empty. </p>
  
  <p>I tried using "a space not followed by a space"( <code>" (?! )"</code> ) as FS but awk does not support negative lookahead. Simple google queries like "single space field separator awk" only sent me to the manual page explaining the special treatment of <code>FS=" "</code>. I must have missed the relevant manual page...</p>
  
  <p>How can I use a single space as field separator with awk?</p>