title: difference between %ms and %s scanf
body: <p>Reading the <code>scanf</code> manual I encounter this line:</p>
  <blockquote>
  <p>An optional 'm' character.  This is used with string conversions
  (<code>%s</code>, <code>%c</code>, <code>%[</code>),</p>
  </blockquote>
  <p>Can someone explain it with simple example stating the difference and the need of such an option in some cases?</p>