title: Split string by length in Golang
body: <p>Does anyone know how to split a string in Golang by length?</p>
  
  <p>For example to split "helloworld" after every 3 characters, so it should ideally return an array of "hel" "low" "orl" "d"?</p>
  
  <p>Alternatively a possible solution would be to also append a newline after every 3 characters..</p>
  
  <p>All ideas are greatly appreciated!</p>