Fix typos in doc comments.

src/libcore/convert.rs

@@ -427,7 +427,7 @@ pub trait TryInto<T>: Sized {
 /// - [`try_from`] is reflexive, which means that `TryFrom<T> for T`
 /// is implemented and cannot fail -- the associated `Error` type for
 /// calling `T::try_from()` on a value of type `T` is [`Infallible`].
-/// When the [`!`] type is stablized [`Infallible`] and [`!`] will be
+/// When the [`!`] type is stabilized [`Infallible`] and [`!`] will be
 /// equivalent.
 ///
 /// `TryFrom<T>` can be implemented as follows:

src/libcore/mem/maybe_uninit.rs

@@ -434,7 +434,7 @@ impl<T> MaybeUninit<T> {
     /// Reads the value from the `MaybeUninit<T>` container. The resulting `T` is subject
     /// to the usual drop handling.
     ///
-    /// Whenever possible, it is preferrable to use [`assume_init`] instead, which
+    /// Whenever possible, it is preferable to use [`assume_init`] instead, which
     /// prevents duplicating the content of the `MaybeUninit<T>`.
     ///
     /// # Safety

src/libcore/ptr/mod.rs

@@ -1611,7 +1611,7 @@ impl<T: ?Sized> *const T {
     /// The offset is expressed in number of `T` elements, and not bytes. The value returned can be
     /// used with the `add` method.
     ///
-    /// There are no guarantees whatsover that offsetting the pointer will not overflow or go
+    /// There are no guarantees whatsoever that offsetting the pointer will not overflow or go
     /// beyond the allocation that the pointer points into. It is up to the caller to ensure that
     /// the returned offset is correct in all terms other than alignment.
     ///
@@ -2412,7 +2412,7 @@ impl<T: ?Sized> *mut T {
     /// The offset is expressed in number of `T` elements, and not bytes. The value returned can be
     /// used with the `add` method.
     ///
-    /// There are no guarantees whatsover that offsetting the pointer will not overflow or go
+    /// There are no guarantees whatsoever that offsetting the pointer will not overflow or go
     /// beyond the allocation that the pointer points into. It is up to the caller to ensure that
     /// the returned offset is correct in all terms other than alignment.
     ///

src/librustc/traits/select.rs

@@ -167,7 +167,7 @@ struct TraitObligationStack<'prev, 'tcx> {
     /// ok on the premise that if `A: AutoTrait` held, but we indeed
     /// encountered a problem (later on) with `A: AutoTrait. So we
     /// currently set a flag on the stack node for `B: AutoTrait` (as
-    /// well as the second instance of `A: AutoTrait`) to supress
+    /// well as the second instance of `A: AutoTrait`) to suppress
     /// caching.
     ///
     /// This is a simple, targeted fix. A more-performant fix requires
@@ -1105,7 +1105,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
     ///
     /// - is a defaulted trait,
     /// - it also appears in the backtrace at some position `X`,
-    /// - all the predicates at positions `X..` between `X` an the top are
+    /// - all the predicates at positions `X..` between `X` and the top are
     ///   also defaulted traits.
     pub fn coinductive_match<I>(&mut self, cycle: I) -> bool
     where

src/libsyntax/parse/mod.rs

@@ -368,7 +368,7 @@ pub fn stream_to_parser_with_base_dir<'a>(
 
 /// A sequence separator.
 pub struct SeqSep {
-    /// The seperator token.
+    /// The separator token.
     pub sep: Option<TokenKind>,
     /// `true` if a trailing separator is allowed.
     pub trailing_sep_allowed: bool,