diff --git a/src/markdown.rs b/src/markdown.rs
index aba7642..b4d500d 100644
--- a/src/markdown.rs
+++ b/src/markdown.rs
@@ -811,7 +811,7 @@ pub fn parse_page(input: &str) -> String {
 /// Parse the markdown syntax for the expandable `<details>` element.
 ///
 /// Similar to the [`parse_page`] page definitions, details elements are denoted
-/// with two ampersand symbols. The opening line should look like `&& [summary]; [open?]`.
+/// with two ampersand symbols. The opening line should look like `&& [summary]`.
 ///
 /// The block is closed with a line of exactly two ampersand symbols.
 ///