Rollup merge of rust-lang#31584 - tshepang:shorten, r=steveklabnik

Author: Manishearth

Diff for: src/libstd/ascii.rs

@@ -55,8 +55,8 @@ pub trait AsciiExt {
     /// let ascii = 'a';
     /// let utf8 = '❤';
     ///
-    /// assert_eq!(true, ascii.is_ascii());
-    /// assert_eq!(false, utf8.is_ascii())
+    /// assert!(ascii.is_ascii());
+    /// assert!(!utf8.is_ascii());
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     fn is_ascii(&self) -> bool;
@@ -114,9 +114,9 @@ pub trait AsciiExt {
     /// let ascii3 = 'A';
     /// let ascii4 = 'z';
     ///
-    /// assert_eq!(true, ascii1.eq_ignore_ascii_case(&ascii2));
-    /// assert_eq!(true, ascii1.eq_ignore_ascii_case(&ascii3));
-    /// assert_eq!(false, ascii1.eq_ignore_ascii_case(&ascii4));
+    /// assert!(ascii1.eq_ignore_ascii_case(&ascii2));
+    /// assert!(ascii1.eq_ignore_ascii_case(&ascii3));
+    /// assert!(!ascii1.eq_ignore_ascii_case(&ascii4));
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     fn eq_ignore_ascii_case(&self, other: &Self) -> bool;