Make Result's unwrap_or_default unstable

Author: devonhollowood

src/libcore/result.rs

@@ -802,8 +802,8 @@ impl<T: Default, E> Result<T, E> {
     /// # Examples
     ///
     /// Convert a string to an integer, turning poorly-formed strings
-    /// into 0 (the default value for integers). `parse` converts
-    /// a string to any other type that implements `FromStr`, returning an
+    /// into 0 (the default value for integers). [`parse`] converts
+    /// a string to any other type that implements [`FromStr`], returning an
     /// `Err` on error.
     ///
     /// ```
@@ -814,9 +814,12 @@ impl<T: Default, E> Result<T, E> {
     ///
     /// assert_eq!(1909, good_year);
     /// assert_eq!(0, bad_year);
+    ///
+    /// [`parse`]: ../../std/primitive.str.html#method.parse
+    /// [`FromStr`]: ../../std/str/trait.FromStr.html
     /// ```
     #[inline]
-    #[stable(feature = "rust1", since = "1.0.0")]
+    #[unstable(feature = "result_unwrap_or_default", issue = "0")]
     pub fn unwrap_or_default(self) -> T {
         match self {
             Ok(x) => x,