title: clang: backslash and newline separated by space in single line comment
body: <p>Why this (<a href="http://rextester.com/XCXKS73869" rel="nofollow">live</a>):</p>
  
  <pre><code>int main()
  {
      // my pretty comment /\   
      //
      // 
  
  
  }
  </code></pre>
  
  <p>gives the warning on clang:</p>
  
  <pre><code>warning: backslash and newline separated by space [-Wbackslash-newline-escape]
  </code></pre>
  
  <p>?</p>
  
  <p>Looks like that code is perfectly valid without any pitfalls.</p>