title: golang remove characters (used for readability) in const string at compile time (spaces, \n and \t)
body: <p>Spaces are useful to indent urls, sql queries to make it more readable.
  Is there a way to remove characters from a const string at compile time in golang ?</p>
  
  <pre><code>ex: (runtime version)
  const url = `https://example.com/path?
  attr1=test
  &amp;attr2=test
  `
  // this is the code to be replaced
  urlTrim := strings.Replace(
  strings.Replace(url, "\n", "", -1)
  )
  </code></pre>