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-rw-r--r--compiler/rustc_feature/src/active.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_feature/src/active.rs b/compiler/rustc_feature/src/active.rs
index 7cf53d40ff6..a55ea314810 100644
--- a/compiler/rustc_feature/src/active.rs
+++ b/compiler/rustc_feature/src/active.rs
@@ -101,6 +101,9 @@ impl Feature {
     }
 }
 
+// See https://rustc-dev-guide.rust-lang.org/feature-gates.html#feature-gates for more
+// documentation about handling feature gates.
+//
 // If you change this, please modify `src/doc/unstable-book` as well.
 //
 // Don't ever remove anything from this list; move them to `accepted.rs` if