Rollup merge of #59121 - czipperz:fix_assert_result_fromiterater, r=Centril

impl FromIterator for Result: Use assert_eq! instead of assert!

src/libcore/result.rs

@@ -1200,7 +1200,7 @@ impl<A, E, V: FromIterator<A>> FromIterator<Result<A, E>> for Result<V, E> {
     /// let res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|
     ///     x.checked_add(1).ok_or("Overflow!")
     /// ).collect();
-    /// assert!(res == Ok(vec![2, 3]));
+    /// assert_eq!(res, Ok(vec![2, 3]));
     /// ```
     #[inline]
     fn from_iter<I: IntoIterator<Item=Result<A, E>>>(iter: I) -> Result<V, E> {