title: Trying to combine text with a whitespace in between arguments
body: <p>I'm trying to combine 2 strings with a whitespace in between, but I'm getting an error when one of the arguments is empty. Anyone got a clue as to how I can solve this?</p>
  <pre class="lang-py prettyprint-override"><code>def combine(arg1, arg2):
      s = ''
      s = arg1.strip()+ ' ' +arg2.strip()
      return s
  </code></pre>