title: Concatenate two folder names
body: <p>This should be easy enough, but I'm stuck on it for too much.</p>
  
  <p>How do I concatenate two folder names?</p>
  
  <p>For example:</p>
  
  <pre><code>ws = r'C:\Temp' 
  folder = "Test"
  </code></pre>
  
  <p>I want to get a result of <code>c:\Temp\Test</code> but everything I do results in <code>c:\TempTest</code>.</p>
  
  <p>I can't use <code>+ "\"</code> because it's invalid operation.</p>