title: regex replace space between words in string
body: <p>Say we have the strings on the left and we want to replace empty space between words with <code>&lt;-&gt;</code></p>
  
  <p><code>" Power Lines"</code> => <code>" Power&lt;-&gt;Lines"</code></p>
  
  <p>Even further, can regex also remove spaces such as a trim in the same regex?</p>
  
  <p><code>" Power Lines"</code> => <code>"Power&lt;-&gt;Lines"</code></p>
  
  <p>These questions pertain to postgres regex_replace function</p>