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    <body><span class="vcard"><a class="email" href="mailto:nvasilyev&#64;apple.com" title="Nikita Vasilyev &lt;nvasilyev&#64;apple.com&gt;"> <span class="fn">Nikita Vasilyev</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION (r?): Web Inspector: Styles sidebar: Uncommenting CSS rules of pseudo-elements doesn't work"
   href="https://bugs.webkit.org/show_bug.cgi?id=165831">bug 165831</a>
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             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Summary</td>
           <td>REGRESSION (r?): Web Inspector: Styles sidebar: Uncommenting CSS rules sometimes doesn't work
           </td>
           <td>REGRESSION (r?): Web Inspector: Styles sidebar: Uncommenting CSS rules of pseudo-elements doesn't work
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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION (r?): Web Inspector: Styles sidebar: Uncommenting CSS rules of pseudo-elements doesn't work"
   href="https://bugs.webkit.org/show_bug.cgi?id=165831#c8">Comment # 8</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION (r?): Web Inspector: Styles sidebar: Uncommenting CSS rules of pseudo-elements doesn't work"
   href="https://bugs.webkit.org/show_bug.cgi?id=165831">bug 165831</a>
              from <span class="vcard"><a class="email" href="mailto:nvasilyev&#64;apple.com" title="Nikita Vasilyev &lt;nvasilyev&#64;apple.com&gt;"> <span class="fn">Nikita Vasilyev</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=165831#c7">comment #7</a>)
<span class="quote">&gt; (In reply to <a href="show_bug.cgi?id=165831#c6">comment #6</a>)
&gt; &gt; (In reply to <a href="show_bug.cgi?id=165831#c5">comment #5</a>)
&gt; &gt; &gt; Created <span class=""><a href="attachment.cgi?id=297480" name="attach_297480" title="[Animated GIF] Re-enabling disabled CSS rules is broken">attachment 297480</a> <a href="attachment.cgi?id=297480&amp;action=edit" title="[Animated GIF] Re-enabling disabled CSS rules is broken">[details]</a></span>
&gt; &gt; &gt; [Animated GIF] Re-enabling disabled CSS rules is broken
&gt; &gt; &gt; 
&gt; &gt; &gt; Looks like this isn't just about pseudo elements — it can happen for any
&gt; &gt; &gt; element.
&gt; 
&gt; This is reproducible in macOS Sierra as well.</span >

Uncommenting inline rules turned out to be a separate issue from uncommenting pseudo-element rules.
<a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - Web Inspector: Uncommenting CSS properties doesn't work for inline styles"
   href="show_bug.cgi?id=166297">Bug 166297</a> - Web Inspector: Uncommenting CSS properties doesn't work for inline styles</pre>
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