title: How to replace string by other strings if the source string contain special characters
body: <p>In order to clean some string, I have to remove some substring that contains some special UTF-8 characters.</p>
  
  <p>example: </p>
  
  <pre><code>source = "Skoda"
  to_be_clean = "Škoda Rapid"
  </code></pre>
  
  <p>I need to replace from <code>to_be_clean</code> the string <code>source</code> by nothing.
  Obviously, the <code>to_be_clean</code> string contains some special character. Is there a way to do this task simply.
  Here is how I am doing it today.</p>
  
  <pre><code>output = to_be_clean.replace(source + ' ', '')
  </code></pre>
  
  <p>I was thinking about a regular expression but I need to list all the possible characters.</p>