diff --git a/library/core/src/cmp.rs b/library/core/src/cmp.rs
index 67dd1d83415bd..cdb6006b1b354 100644
--- a/library/core/src/cmp.rs
+++ b/library/core/src/cmp.rs
@@ -334,7 +334,6 @@ impl Ordering {
     /// # Examples
     ///
     /// ```
-    /// #![feature(ordering_helpers)]
     /// use std::cmp::Ordering;
     ///
     /// assert_eq!(Ordering::Less.is_eq(), false);
@@ -343,7 +342,8 @@ impl Ordering {
     /// ```
     #[inline]
     #[must_use]
-    #[unstable(feature = "ordering_helpers", issue = "79885")]
+    #[rustc_const_stable(feature = "ordering_helpers", since = "1.53.0")]
+    #[stable(feature = "ordering_helpers", since = "1.53.0")]
     pub const fn is_eq(self) -> bool {
         matches!(self, Equal)
     }
@@ -353,7 +353,6 @@ impl Ordering {
     /// # Examples
     ///
     /// ```
-    /// #![feature(ordering_helpers)]
     /// use std::cmp::Ordering;
     ///
     /// assert_eq!(Ordering::Less.is_ne(), true);
@@ -362,7 +361,8 @@ impl Ordering {
     /// ```
     #[inline]
     #[must_use]
-    #[unstable(feature = "ordering_helpers", issue = "79885")]
+    #[rustc_const_stable(feature = "ordering_helpers", since = "1.53.0")]
+    #[stable(feature = "ordering_helpers", since = "1.53.0")]
     pub const fn is_ne(self) -> bool {
         !matches!(self, Equal)
     }
@@ -372,7 +372,6 @@ impl Ordering {
     /// # Examples
     ///
     /// ```
-    /// #![feature(ordering_helpers)]
     /// use std::cmp::Ordering;
     ///
     /// assert_eq!(Ordering::Less.is_lt(), true);
@@ -381,7 +380,8 @@ impl Ordering {
     /// ```
     #[inline]
     #[must_use]
-    #[unstable(feature = "ordering_helpers", issue = "79885")]
+    #[rustc_const_stable(feature = "ordering_helpers", since = "1.53.0")]
+    #[stable(feature = "ordering_helpers", since = "1.53.0")]
     pub const fn is_lt(self) -> bool {
         matches!(self, Less)
     }
@@ -391,7 +391,6 @@ impl Ordering {
     /// # Examples
     ///
     /// ```
-    /// #![feature(ordering_helpers)]
     /// use std::cmp::Ordering;
     ///
     /// assert_eq!(Ordering::Less.is_gt(), false);
@@ -400,7 +399,8 @@ impl Ordering {
     /// ```
     #[inline]
     #[must_use]
-    #[unstable(feature = "ordering_helpers", issue = "79885")]
+    #[rustc_const_stable(feature = "ordering_helpers", since = "1.53.0")]
+    #[stable(feature = "ordering_helpers", since = "1.53.0")]
     pub const fn is_gt(self) -> bool {
         matches!(self, Greater)
     }
@@ -410,7 +410,6 @@ impl Ordering {
     /// # Examples
     ///
     /// ```
-    /// #![feature(ordering_helpers)]
     /// use std::cmp::Ordering;
     ///
     /// assert_eq!(Ordering::Less.is_le(), true);
@@ -419,7 +418,8 @@ impl Ordering {
     /// ```
     #[inline]
     #[must_use]
-    #[unstable(feature = "ordering_helpers", issue = "79885")]
+    #[rustc_const_stable(feature = "ordering_helpers", since = "1.53.0")]
+    #[stable(feature = "ordering_helpers", since = "1.53.0")]
     pub const fn is_le(self) -> bool {
         !matches!(self, Greater)
     }
@@ -429,7 +429,6 @@ impl Ordering {
     /// # Examples
     ///
     /// ```
-    /// #![feature(ordering_helpers)]
     /// use std::cmp::Ordering;
     ///
     /// assert_eq!(Ordering::Less.is_ge(), false);
@@ -438,7 +437,8 @@ impl Ordering {
     /// ```
     #[inline]
     #[must_use]
-    #[unstable(feature = "ordering_helpers", issue = "79885")]
+    #[rustc_const_stable(feature = "ordering_helpers", since = "1.53.0")]
+    #[stable(feature = "ordering_helpers", since = "1.53.0")]
     pub const fn is_ge(self) -> bool {
         !matches!(self, Less)
     }
diff --git a/library/core/src/time.rs b/library/core/src/time.rs
index fa6a6c2cccc01..bfea39e3211fc 100644
--- a/library/core/src/time.rs
+++ b/library/core/src/time.rs
@@ -135,17 +135,21 @@ impl Duration {
 
     /// The maximum duration.
     ///
-    /// It is roughly equal to a duration of 584,942,417,355 years.
+    /// May vary by platform as necessary. Must be able to contain the difference between
+    /// two instances of [`Instant`] or two instances of [`SystemTime`].
+    /// This constraint gives it a value of about 584,942,417,355 years in practice,
+    /// which is currently used on all platforms.
     ///
     /// # Examples
     ///
     /// ```
-    /// #![feature(duration_constants)]
     /// use std::time::Duration;
     ///
     /// assert_eq!(Duration::MAX, Duration::new(u64::MAX, 1_000_000_000 - 1));
     /// ```
-    #[unstable(feature = "duration_constants", issue = "57391")]
+    /// [`Instant`]: ../../std/time/struct.Instant.html
+    /// [`SystemTime`]: ../../std/time/struct.SystemTime.html
+    #[stable(feature = "duration_saturating_ops", since = "1.53.0")]
     pub const MAX: Duration = Duration::new(u64::MAX, NANOS_PER_SEC - 1);
 
     /// Creates a new `Duration` from the specified number of whole seconds and
diff --git a/library/std/src/env.rs b/library/std/src/env.rs
index 5fa092af1da02..116a37249e392 100644
--- a/library/std/src/env.rs
+++ b/library/std/src/env.rs
@@ -710,14 +710,14 @@ pub struct ArgsOs {
 /// passed as-is.
 ///
 /// On glibc Linux systems, arguments are retrieved by placing a function in `.init_array`.
-/// Glibc passes `argc`, `argv`, and `envp` to functions in `.init_array`, as a non-standard
+/// glibc passes `argc`, `argv`, and `envp` to functions in `.init_array`, as a non-standard
 /// extension. This allows `std::env::args` to work even in a `cdylib` or `staticlib`, as it
 /// does on macOS and Windows.
 ///
 /// # Panics
 ///
 /// The returned iterator will panic during iteration if any argument to the
-/// process is not valid unicode. If this is not desired,
+/// process is not valid Unicode. If this is not desired,
 /// use the [`args_os`] function instead.
 ///
 /// # Examples
@@ -735,17 +735,25 @@ pub fn args() -> Args {
     Args { inner: args_os() }
 }
 
-/// Returns the arguments which this program was started with (normally passed
+/// Returns the arguments that this program was started with (normally passed
 /// via the command line).
 ///
 /// The first element is traditionally the path of the executable, but it can be
-/// set to arbitrary text, and it may not even exist, so this property should
+/// set to arbitrary text, and may not even exist. This means this property should
 /// not be relied upon for security purposes.
 ///
-/// On glibc Linux systems, arguments are retrieved by placing a function in ".init_array".
-/// Glibc passes argc, argv, and envp to functions in ".init_array", as a non-standard extension.
-/// This allows `std::env::args` to work even in a `cdylib` or `staticlib`, as it does on macOS
-/// and Windows.
+/// On Unix systems the shell usually expands unquoted arguments with glob patterns
+/// (such as `*` and `?`). On Windows this is not done, and such arguments are
+/// passed as-is.
+///
+/// On glibc Linux systems, arguments are retrieved by placing a function in `.init_array`.
+/// glibc passes `argc`, `argv`, and `envp` to functions in `.init_array`, as a non-standard
+/// extension. This allows `std::env::args_os` to work even in a `cdylib` or `staticlib`, as it
+/// does on macOS and Windows.
+///
+/// Note that the returned iterator will not check if the arguments to the
+/// process are valid Unicode. To ensure UTF-8 validity,
+/// use the [`args`] function instead.
 ///
 /// # Examples
 ///
diff --git a/src/librustdoc/visit_ast.rs b/src/librustdoc/visit_ast.rs
index 3538182427a93..c9071eea78b79 100644
--- a/src/librustdoc/visit_ast.rs
+++ b/src/librustdoc/visit_ast.rs
@@ -150,7 +150,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
         om
     }
 
-    /// Tries to resolve the target of a `crate use` statement and inlines the
+    /// Tries to resolve the target of a `pub use` statement and inlines the
     /// target if it is defined locally and would not be documented otherwise,
     /// or when it is specifically requested with `please_inline`.
     /// (the latter is the case when the import is marked `doc(inline)`)
@@ -183,7 +183,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
             || use_attrs.lists(sym::doc).has_word(sym::hidden);
 
         // For cross-crate impl inlining we need to know whether items are
-        // reachable in documentation -- a previously nonreachable item can be
+        // reachable in documentation -- a previously unreachable item can be
         // made reachable by cross-crate inlining which we're checking here.
         // (this is done here because we need to know this upfront).
         if !res_did.is_local() && !is_no_inline {