Rollup merge of #113072 - tshepang:patch-1, r=cuviper

str docs: remove "Basic usage" text where not useful

Not "useful" in that there is only one example given

Author: matthiaskrgr

library/core/src/str/mod.rs

@@ -144,8 +144,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let len = "foo".len();
     /// assert_eq!(3, len);
@@ -165,8 +163,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = "";
     /// assert!(s.is_empty());
@@ -311,8 +307,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let bytes = "bors".as_bytes();
     /// assert_eq!(b"bors", bytes);
@@ -387,8 +381,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = "Hello";
     /// let ptr = s.as_ptr();
@@ -570,8 +562,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = "Löwe 老虎 Léopard";
     ///
@@ -649,8 +639,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = "Per Martin-Löf";
     ///
@@ -691,8 +679,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut s = "Per Martin-Löf".to_string();
     /// {
@@ -840,8 +826,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let mut bytes = "bors".bytes();
     ///
@@ -1020,8 +1004,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let text = "Zażółć gęślą jaźń";
     ///
@@ -1050,8 +1032,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let bananas = "bananas";
     ///
@@ -1077,8 +1057,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let bananas = "bananas";
     ///
@@ -1103,8 +1081,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let bananas = "bananas";
     ///
@@ -1463,8 +1439,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let v: Vec<&str> = "A.B.".split_terminator('.').collect();
     /// assert_eq!(v, ["A", "B"]);
@@ -1696,8 +1670,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let v: Vec<&str> = "abcXXXabcYYYabc".matches("abc").collect();
     /// assert_eq!(v, ["abc", "abc", "abc"]);
@@ -1732,8 +1704,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let v: Vec<&str> = "abcXXXabcYYYabc".rmatches("abc").collect();
     /// assert_eq!(v, ["abc", "abc", "abc"]);
@@ -1775,8 +1745,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let v: Vec<_> = "abcXXXabcYYYabc".match_indices("abc").collect();
     /// assert_eq!(v, [(0, "abc"), (6, "abc"), (12, "abc")]);
@@ -1817,8 +1785,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let v: Vec<_> = "abcXXXabcYYYabc".rmatch_indices("abc").collect();
     /// assert_eq!(v, [(12, "abc"), (6, "abc"), (0, "abc")]);
@@ -1845,8 +1811,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// let s = "\n Hello\tworld\t\n";
     ///
@@ -2085,8 +2049,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// assert_eq!("11foo1bar11".trim_start_matches('1'), "foo1bar11");
     /// assert_eq!("123foo1bar123".trim_start_matches(char::is_numeric), "foo1bar123");
@@ -2232,8 +2194,6 @@ impl str {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// assert_eq!("11foo1bar11".trim_left_matches('1'), "foo1bar11");
     /// assert_eq!("123foo1bar123".trim_left_matches(char::is_numeric), "foo1bar123");