title: how to write a function in haskell which inserts space after every character of String
body: <p>i want to implemet a method in haskeel which should add space after every char of string passed to that method but not after the last char of the string
   for example</p>
  
  <pre><code>Main&gt; insertSpace "This is world"
  "T h i s  i s  w o r l d"
  </code></pre>