title: Disable "Documentation Comments" warning for selected files
body: <p>Xcode has the ability to check for Documentation Comments issues and report warnings when something is not quite right. For instance, I've added Facebook SDK to my project using CocoaPods. At some point in the file <code>FBError.h</code> there's the following code:</p>
  
  <pre><code>/*!
   @typedef NS_ENUM (NSInteger, FBErrorCategory)
  
   @abstract Indicates the Facebook SDK classification for the error
  
   @discussion
   */
  </code></pre>
  
  <p>Note that the <code>@discussion</code> parameter is empty, and Xcode will generate a warning accordingly:</p>
  
  <blockquote>
    <p>Empty paragraph passed to '@discussion' command</p>
  </blockquote>
  
  <p>However, Facebook SDK is not the only library I've added to my project, and the Issues tab is full of other documentation related warnings from 3rd party files, from the Pods I installed.</p>
  
  <p>I'd like to know how to suppress this kind of warning for those files.</p>