diff --git a/library/alloc/src/string.rs b/library/alloc/src/string.rs
index 9254786d1295d..ed43244ebda19 100644
--- a/library/alloc/src/string.rs
+++ b/library/alloc/src/string.rs
@@ -388,8 +388,6 @@ pub struct String {
 ///
 /// # Examples
 ///
-/// Basic usage:
-///
 /// ```
 /// // some invalid bytes, in a vector
 /// let bytes = vec![0, 159];
@@ -412,9 +410,8 @@ pub struct FromUtf8Error {
 /// This type is the error type for the [`from_utf16`] method on [`String`].
 ///
 /// [`from_utf16`]: String::from_utf16
-/// # Examples
 ///
-/// Basic usage:
+/// # Examples
 ///
 /// ```
 /// // 𝄞mu<invalid>ic
@@ -441,8 +438,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = String::new();
     /// ```
@@ -472,8 +467,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::with_capacity(10);
     ///
@@ -661,8 +654,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// // 𝄞music
     /// let v = &[0xD834, 0xDD1E, 0x006d, 0x0075,
@@ -704,8 +695,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// // 𝄞mus<invalid>ic<invalid>
     /// let v = &[0xD834, 0xDD1E, 0x006d, 0x0075,
@@ -784,8 +773,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// use std::mem;
     ///
@@ -827,8 +814,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// // some bytes, in a vector
     /// let sparkle_heart = vec![240, 159, 146, 150];
@@ -852,8 +837,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = String::from("hello");
     /// let bytes = s.into_bytes();
@@ -871,8 +854,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = String::from("foo");
     ///
@@ -889,8 +870,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("foobar");
     /// let s_mut_str = s.as_mut_str();
@@ -910,8 +889,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("foo");
     ///
@@ -966,8 +943,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = String::with_capacity(10);
     ///
@@ -1157,8 +1132,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("foo");
     ///
@@ -1206,8 +1179,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("abc");
     ///
@@ -1235,8 +1206,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = String::from("hello");
     ///
@@ -1263,8 +1232,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("hello");
     ///
@@ -1287,8 +1254,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("abč");
     ///
@@ -1321,8 +1286,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("abç");
     ///
@@ -1514,8 +1477,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::with_capacity(3);
     ///
@@ -1563,8 +1524,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("bar");
     ///
@@ -1595,8 +1554,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("hello");
     ///
@@ -1620,8 +1577,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let a = String::from("foo");
     /// assert_eq!(a.len(), 3);
@@ -1641,8 +1596,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut v = String::new();
     /// assert!(v.is_empty());
@@ -1697,8 +1650,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("foo");
     ///
@@ -1734,8 +1685,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("α is alpha, β is beta");
     /// let beta_offset = s.find('β').unwrap_or(s.len());
@@ -1784,8 +1733,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = String::from("α is alpha, β is beta");
     /// let beta_offset = s.find('β').unwrap_or(s.len());
@@ -1834,8 +1781,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = String::from("hello");
     ///
@@ -1866,8 +1811,6 @@ impl String {
     ///
     /// # Examples
     ///
-    /// Simple usage:
-    ///
     /// ```
     /// let x = String::from("bucket");
     /// let static_ref: &'static mut str = x.leak();
@@ -1886,8 +1829,6 @@ impl FromUtf8Error {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// // some invalid bytes, in a vector
     /// let bytes = vec![0, 159];
@@ -1910,8 +1851,6 @@ impl FromUtf8Error {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// // some invalid bytes, in a vector
     /// let bytes = vec![0, 159];
@@ -1938,8 +1877,6 @@ impl FromUtf8Error {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// // some invalid bytes, in a vector
     /// let bytes = vec![0, 159];
@@ -2490,8 +2427,6 @@ pub trait ToString {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let i = 5;
     /// let five = String::from("5");
@@ -2711,8 +2646,6 @@ impl From<Box<str>> for String {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s1: String = String::from("hello world");
     /// let s2: Box<str> = s1.into_boxed_str();
@@ -2732,8 +2665,6 @@ impl From<String> for Box<str> {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s1: String = String::from("hello world");
     /// let s2: Box<str> = Box::from(s1);
@@ -2866,8 +2797,6 @@ impl From<String> for Vec<u8> {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s1 = String::from("hello world");
     /// let v1 = Vec::from(s1);