title: Rename command not evaluating expressions
body: <p>i have the  following files in my unix box:</p>
  
  <pre><code>CB_CB13_B01_20190502.txt 
  
  CB_CB13_B01_20190503.txt.1
  
  CB_CB13_B01_20190504.txt.2 
  
  CB_CB13_B01_20190505.txt.3
  
  CB_CB13_B01_20190506.txt.a 
  
  CB_CB13_B01_20190507.txt.b
  </code></pre>
  
  <p>and so on</p>
  
  <p>I am trying to remove all of the characters after .txt with the help of rename command:</p>
  
  <pre><code>rename "txt.*" ".txt" *
  </code></pre>
  
  <p>The rename is not working when i use * in the expression. any idea what i am doing wrong here.</p>