Add tests for text/event-stream highlighting

Author: handrews

tests/md2html/fixtures/basic-new.html

@@ -45,6 +45,14 @@
 </code></pre>
 <pre class="nohighlight" tabindex="0"><code>https://foo.com/bar{<span class="hljs-attr">?baz*</span>,<span class="hljs-attr">qux</span>}
 </code></pre>
+<pre class="nohighlight" tabindex="0"><code><span class="hljs-attr">data:</span> This data is formatted
+<span class="hljs-attr">data:</span> across two lines
+<span class="hljs-attr">retry:</span> 5
+<span class="hljs-attr">
+event:</span> add
+<span class="hljs-attr">data:</span> 1234.5678
+<span class="hljs-attr">unknown-field:</span> this is ignored
+<span class="hljs-attr"></span></code></pre>
 </section></section><section class="appendix"><h1>Appendix A: Revision History</h1>
 <table>
 <thead>

tests/md2html/fixtures/basic-new.md

@@ -62,6 +62,16 @@ https://foo.com/bar?baz=qux&fred=waldo#fragment
 https://foo.com/bar{?baz*,qux}
 ```
 
+```eventstream
+data: This data is formatted
+data: across two lines
+retry: 5
+
+event: add
+data: 1234.5678
+unknown-field: this is ignored
+```
+
 ## Appendix A: Revision History
 
 Version | Date