Viewing github.com/alecthomas/chroma/lexers/embedded/plaintext.xml

```
<lexer>
```
```
  <config>
```
```
    <name>plaintext</name>
```
```
    <alias>text</alias>
```
```
    <alias>plain</alias>
```
```
    <alias>no-highlight</alias>
```
```
    <filename>*.txt</filename>
```
```
    <mime_type>text/plain</mime_type>
```
```
    <priority>-1</priority>
```
```
  </config>
```
```
  <rules>
```
```
    <state name="root">
```
```
      <rule pattern=".+">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
      <rule pattern="\n">
```
```
        <token type="Text"/>
```
```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```