Set unstable feature names appropriately

* `core` - for the core crate
* `hash` - hashing
* `io` - io
* `path` - path
* `alloc` - alloc crate
* `rand` - rand crate
* `collections` - collections crate
* `std_misc` - other parts of std
* `test` - test crate
* `rustc_private` - everything else

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/rand/mod.rs b/src/libstd/rand/mod.rs
index 2b7b026af5e..5844cc85c31 100644
--- a/src/libstd/rand/mod.rs
+++ b/src/libstd/rand/mod.rs
@@ -219,7 +219,7 @@
 //! }
 //! ```
 
-#![unstable(feature = "unnamed_feature")]
+#![unstable(feature = "rand")]
 
 use cell::RefCell;
 use clone::Clone;