DXR will be turned off on Tuesday, December 29th. It will redirect to Searchfox.
See the announcement on Discourse.

DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Line Code
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<!DOCTYPE HTML>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mtable width="100%" mathbackground="red">
   <mtr> <mtd><mi>x</mi></mtd> </mtr>
  </mtable>
</math>

<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mtable mathbackground="red">
   <mtr> <mtd><mi>x</mi></mtd> </mtr>
  </mtable>
</math>

<math display="inline" xmlns="http://www.w3.org/1998/Math/MathML">
  <mtable width="100%" mathbackground="red">
   <mtr> <mtd><mi>x</mi></mtd> </mtr>
  </mtable>
</math>

<math display="inline" xmlns="http://www.w3.org/1998/Math/MathML">
  <mtable mathbackground="red">
   <mtr> <mtd><mi>x</mi></mtd> </mtr>
  </mtable>
</math>