title: Remove space from a string
body: <p>Say I have a string like this:</p>
  
  <p>set str "BAT-CAT, DOG,ELEPHANT  ,LION &amp; MOUSE-ANT ,MONKEY, DONKEY"</p>
  
  <p>Now I want to get STRING as follows:</p>
  
  <p>"BAT-CAT,DOG,ELEPHANT,LION&amp;MOUSE-ANT,MONKEY,DONKEY"</p>
  
  <p>I am using trim function to remove white space but it is not working kindly suggest any regsub or procedure for same thank you</p>