cheat/vendor/github.com/alecthomas/chroma/v2/lexers/embedded/erb.xml

<lexer>
  <config>
    <name>ERB</name>
    <dot_all>true</dot_all>
  </config>
  <rules>
    <state name="root">
      <rule pattern="(&lt;%#)(.*?)(-?%&gt;)">
        <bygroups>
          <token type="CommentPreproc"/>
          <token type="Comment"/>
          <token type="CommentPreproc"/>
        </bygroups>
      </rule>
      <rule pattern="(&lt;%-?=)(.*?)(-?%&gt;)">
        <bygroups>
          <token type="CommentPreproc"/>
          <using lexer="Ruby"/>
          <token type="CommentPreproc"/>
        </bygroups>
      </rule>
      <rule pattern="(&lt;%-?)(.*?)(-?%&gt;)">
        <bygroups>
          <token type="CommentPreproc"/>
          <using lexer="Ruby"/>
          <token type="CommentPreproc"/>
        </bygroups>
      </rule>
      <rule pattern="[^&lt;]+">
        <token type="Other"/>
      </rule>
      <rule pattern="&lt;">
        <token type="Other"/>
      </rule>
    </state>
  </rules>
</lexer>