Improvements to feature staging

This gets rid of the 'experimental' level, removes the non-staged_api
case (i.e. stability levels for out-of-tree crates), and lets the
staged_api attributes use 'unstable' and 'deprecated' lints.

This makes the transition period to the full feature staging design
a bit nicer.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd/fmt.rs b/src/libstd/fmt.rs
index 96fff64d221..907925e93d3 100644
--- a/src/libstd/fmt.rs
+++ b/src/libstd/fmt.rs
@@ -410,7 +410,7 @@
 //! them with the same character. For example, the `{` character is escaped with
 //! `{{` and the `}` character is escaped with `}}`.
 
-#![experimental]
+#![unstable]
 
 use string;
 
@@ -439,7 +439,7 @@ pub use core::fmt::{argument, argumentuint};
 /// let s = fmt::format(format_args!("Hello, {}!", "world"));
 /// assert_eq!(s, "Hello, world!".to_string());
 /// ```
-#[experimental = "this is an implementation detail of format! and should not \
+#[unstable = "this is an implementation detail of format! and should not \
                   be called directly"]
 pub fn format(args: Arguments) -> string::String {
     let mut output = string::String::new();