Switches are not stored for comment blocks, but they are allowed to appear.

src/types/lesser_element.rs

@@ -33,7 +33,6 @@ pub struct VerseBlock<'s> {
 pub struct CommentBlock<'s> {
     pub source: &'s str,
     pub name: &'s str,
-    pub data: Option<&'s str>,
     pub contents: &'s str,
 }