trpl: mention doc(hidden)

diff --git a/src/doc/trpl/documentation.md b/src/doc/trpl/documentation.md
index abd09a6780352953ac2696839087c825b7528244..8cb58ecf2c74713fb5f68f79e4af666335c99af7 100644 (file)
--- a/src/doc/trpl/documentation.md
+++ b/src/doc/trpl/documentation.md
@@ -571,6 +571,13 @@ leave something undocumented. This is done by using `allow`:
 struct Undocumented;
 ```
 
+You might even want to hide items from the documentation completely:
+
+```rust
+#[doc(hidden)]
+struct Hidden;
+```
+
 ### Controlling HTML
 
 You can control a few aspects of the HTML that `rustdoc` generates through the