title: How to remove leading space when printing with write?
body: <p>Suppose I have the following code</p>
  
  <pre><code>program fortran
    open(900, FILE='SOMETHING')   
    write(900, *) '21'    
  end program fortran
  </code></pre>
  
  <p>The file form will be</p>
  
  <pre><code> 21
  </code></pre>
  
  <p>that is, there is a space before the number. How to get rid of that space?</p>