Fix build failure due to missing_docs lint

Author: GuillaumeGomez

library/core/src/str/pattern.rs

@@ -161,13 +161,13 @@ pub trait Pattern<'a>: Sized {
 pub enum SearchStep {
     /// Expresses that a match of the pattern has been found at
     /// `haystack[a..b]`.
-    Match(usize, usize),
+    Match(#[allow(missing_docs)] usize, #[allow(missing_docs)] usize),
     /// Expresses that `haystack[a..b]` has been rejected as a possible match
     /// of the pattern.
     ///
     /// Note that there might be more than one `Reject` between two `Match`es,
     /// there is no requirement for them to be combined into one.
-    Reject(usize, usize),
+    Reject(#[allow(missing_docs)] usize, #[allow(missing_docs)] usize),
     /// Expresses that every byte of the haystack has been visited, ending
     /// the iteration.
     Done,

library/std/src/path.rs

@@ -147,8 +147,12 @@ pub enum Prefix<'a> {
     /// server's hostname and a share name.
     #[stable(feature = "rust1", since = "1.0.0")]
     VerbatimUNC(
-        #[stable(feature = "rust1", since = "1.0.0")] &'a OsStr,
-        #[stable(feature = "rust1", since = "1.0.0")] &'a OsStr,
+        #[stable(feature = "rust1", since = "1.0.0")]
+        #[allow(missing_docs)]
+        &'a OsStr,
+        #[stable(feature = "rust1", since = "1.0.0")]
+        #[allow(missing_docs)]
+        &'a OsStr,
     ),
 
     /// Verbatim disk prefix, e.g., `\\?\C:`.
@@ -171,8 +175,12 @@ pub enum Prefix<'a> {
     /// UNC prefixes consist of the server's hostname and a share name.
     #[stable(feature = "rust1", since = "1.0.0")]
     UNC(
-        #[stable(feature = "rust1", since = "1.0.0")] &'a OsStr,
-        #[stable(feature = "rust1", since = "1.0.0")] &'a OsStr,
+        #[stable(feature = "rust1", since = "1.0.0")]
+        #[allow(missing_docs)]
+        &'a OsStr,
+        #[stable(feature = "rust1", since = "1.0.0")]
+        #[allow(missing_docs)]
+        &'a OsStr,
     ),
 
     /// Prefix `C:` for the given disk drive.