Rollup merge of #45977 - kennytm:fix-pulldown-warnings, r=steveklabnik

Fixed several pulldown warnings when documenting libstd.

Author: GuillaumeGomez

src/liballoc/str.rs

@@ -2293,7 +2293,7 @@ impl str {
     ///
     /// - U+0021 ... U+002F `! " # $ % & ' ( ) * + , - . /`, or
     /// - U+003A ... U+0040 `: ; < = > ? @`, or
-    /// - U+005B ... U+0060 `[ \\ ] ^ _ \``, or
+    /// - U+005B ... U+0060 ``[ \ ] ^ _ ` ``, or
     /// - U+007B ... U+007E `{ | } ~`
     #[unstable(feature = "ascii_ctype", issue = "39658")]
     #[inline]

src/libcore/num/mod.rs

@@ -2630,7 +2630,7 @@ impl u8 {
     ///
     /// - U+0021 ... U+002F `! " # $ % & ' ( ) * + , - . /`, or
     /// - U+003A ... U+0040 `: ; < = > ? @`, or
-    /// - U+005B ... U+0060 `[ \\ ] ^ _ \``, or
+    /// - U+005B ... U+0060 ``[ \ ] ^ _ ` ``, or
     /// - U+007B ... U+007E `{ | } ~`
     ///
     /// # Examples

src/libstd/io/mod.rs

@@ -737,7 +737,7 @@ pub trait Read {
     /// Transforms this `Read` instance to an [`Iterator`] over its bytes.
     ///
     /// The returned type implements [`Iterator`] where the `Item` is
-    /// [`Result`]`<`[`u8`]`, `[`io::Error`]>`.
+    /// [`Result`]`<`[`u8`]`, `[`io::Error`]`>`.
     /// The yielded item is [`Ok`] if a byte was successfully read and [`Err`]
     /// otherwise. EOF is mapped to returning [`None`] from this iterator.
     ///
@@ -748,7 +748,7 @@ pub trait Read {
     /// [file]: ../fs/struct.File.html
     /// [`Iterator`]: ../../std/iter/trait.Iterator.html
     /// [`Result`]: ../../std/result/enum.Result.html
-    /// [`io::Error``]: ../../std/io/struct.Error.html
+    /// [`io::Error`]: ../../std/io/struct.Error.html
     /// [`u8`]: ../../std/primitive.u8.html
     /// [`Ok`]: ../../std/result/enum.Result.html#variant.Ok
     /// [`Err`]: ../../std/result/enum.Result.html#variant.Err

src/libstd_unicode/char.rs

@@ -1292,7 +1292,7 @@ impl char {
     ///
     /// - U+0021 ... U+002F `! " # $ % & ' ( ) * + , - . /`, or
     /// - U+003A ... U+0040 `: ; < = > ? @`, or
-    /// - U+005B ... U+0060 `[ \\ ] ^ _ \``, or
+    /// - U+005B ... U+0060 ``[ \ ] ^ _ ` ``, or
     /// - U+007B ... U+007E `{ | } ~`
     ///
     /// # Examples