title: How to remove multiple consecutive special characters in R?
body: <p>How can I alter the following strings to not contain multiple consecutive question marks / other special characters in R?</p>
  
  <pre><code>"Nice one!!!"
  </code></pre>
  
  <p>should become</p>
  
  <pre><code>"Nice one!"
  </code></pre>
  
  <p>and</p>
  
  <pre><code>"Whazzup????!!"
  </code></pre>
  
  <p>should become</p>
  
  <pre><code>"Whazzup?!"
  </code></pre>
  
  <p>I experimented with multiple regex commands without success. Obviously I can replace two question marks with one but I want it to be independent of the amount of special characters.</p>
  
  <p>This is different from the marked duplicate because it deals with special characters.</p>