title: How can I print spaces in prolog
body: <p>i need to print into stream using write(), but I can't figure out how to print 'blank' spaces.
  For example i want to write</p>
  
  <pre><code>       10    3     
     5     3    6
  </code></pre>
  
  <p>write('    10    3') just writes 10 3 (delets the extra spaces), and I want to print leading spaces. Does anybody know how I can do this?</p>
  
  <p>edit: I want to print a matrix of characters which contains some blank spaces and some numbers. The end goal of a program is that. But if I do </p>
  
  <pre><code>?- write(' '), write(' '), write('3')
  3
  true
  </code></pre>
  
  <p>and I want to achieve</p>
  
  <pre><code>   3
  </code></pre>