Cleanup.

src/types/lesser_element.rs

@@ -269,6 +269,9 @@ impl<'s> Comment<'s> {
 }
 
 impl<'s> ExportBlock<'s> {
+    /// Gets the export type capitalized.
+    ///
+    /// Upstream Emacs Org-mode capitalizes the export type.
     pub fn get_export_type(&self) -> Option<String> {
         self.export_type.map(|s| s.to_uppercase())
     }