Auto merge of #64972 - Centril:rollup-gcawast, r=Centril

Rollup of 7 pull requests

Successful merges:

 - #63416 (apfloat: improve doc comments)
 - #64820 (BTreeSet intersection, is_subset & difference optimizations)
 - #64910 (syntax: cleanup param, method, and misc parsing)
 - #64912 (Remove unneeded `fn main` blocks from docs)
 - #64933 (Fixes #64919. Suggest fix based on operator precendence.)
 - #64943 (Add lower bound doctests for `saturating_{add,sub}` signed ints)
 - #64950 (Simplify interners)

Failed merges:

r? @ghost

1 files changed, 3 insertions, 8 deletions

diff --git a/src/liballoc/slice.rs b/src/liballoc/slice.rs
index 881d499c074..4e4a285c21d 100644
--- a/src/liballoc/slice.rs
+++ b/src/liballoc/slice.rs
@@ -412,20 +412,15 @@ impl<T> [T] {
     ///
     /// ```
     /// #![feature(repeat_generic_slice)]
-    ///
-    /// fn main() {
-    ///     assert_eq!([1, 2].repeat(3), vec![1, 2, 1, 2, 1, 2]);
-    /// }
+    /// assert_eq!([1, 2].repeat(3), vec![1, 2, 1, 2, 1, 2]);
     /// ```
     ///
     /// A panic upon overflow:
     ///
     /// ```should_panic
     /// #![feature(repeat_generic_slice)]
-    /// fn main() {
-    ///     // this will panic at runtime
-    ///     b"0123456789abcdef".repeat(usize::max_value());
-    /// }
+    /// // this will panic at runtime
+    /// b"0123456789abcdef".repeat(usize::max_value());
     /// ```
     #[unstable(feature = "repeat_generic_slice",
                reason = "it's on str, why not on slice?",