ArcanistDoubleQuoteXHPASTLinterRule gets the following code wrong:

<?php

echo "\$x";

The proposed linter fix suggested by ArcanistDoubleQuoteXHPASTLinterRule is:

@@ -1,3 +1,3 @@
 <?php
 
-echo "\$foo";
+echo '\$foo';

This is incorrect and should instead be:

@@ -1,3 +1,3 @@
 <?php
 
-echo "\$foo";
+echo '$foo';