Fix documentation typos.

src/libcore/alloc.rs

@@ -506,7 +506,7 @@ pub unsafe trait GlobalAlloc {
         ptr
     }
 
-    /// Shink or grow a block of memory to the given `new_size`.
+    /// Shrink or grow a block of memory to the given `new_size`.
     /// The block is described by the given `ptr` pointer and `layout`.
     ///
     /// If this returns a non-null pointer, then ownership of the memory block
@@ -757,7 +757,7 @@ pub unsafe trait Alloc {
     // realloc. alloc_excess, realloc_excess
 
     /// Returns a pointer suitable for holding data described by
-    /// a new layout with `layout`’s alginment and a size given
+    /// a new layout with `layout`’s alignment and a size given
     /// by `new_size`. To
     /// accomplish this, this may extend or shrink the allocation
     /// referenced by `ptr` to fit the new layout.

src/libcore/future/future.rs

@@ -17,7 +17,7 @@ use ops;
 use pin::Pin;
 use task::{Poll, LocalWaker};
 
-/// A future represents an asychronous computation.
+/// A future represents an asynchronous computation.
 ///
 /// A future is a value that may not have finished computing yet. This kind of
 /// "asynchronous value" makes it possible for a thread to continue doing useful

src/libcore/lib.rs

@@ -228,7 +228,7 @@ mod nonzero;
 mod tuple;
 mod unit;
 
-// Pull in the the `coresimd` crate directly into libcore. This is where all the
+// Pull in the `coresimd` crate directly into libcore. This is where all the
 // architecture-specific (and vendor-specific) intrinsics are defined. AKA
 // things like SIMD and such. Note that the actual source for all this lies in a
 // different repository, rust-lang-nursery/stdsimd. That's why the setup here is

src/libcore/mem.rs

@@ -202,7 +202,7 @@ pub fn forget<T>(t: T) {
 ///
 /// ## Size of Enums
 ///
-/// Enums that carry no data other than the descriminant have the same size as C enums
+/// Enums that carry no data other than the discriminant have the same size as C enums
 /// on the platform they are compiled for.
 ///
 /// ## Size of Unions
@@ -1081,7 +1081,7 @@ impl<T> MaybeUninit<T> {
     ///
     /// # Unsafety
     ///
-    /// It is up to the caller to guarantee that the the `MaybeUninit` really is in an initialized
+    /// It is up to the caller to guarantee that the `MaybeUninit` really is in an initialized
     /// state, otherwise this will immediately cause undefined behavior.
     #[unstable(feature = "maybe_uninit", issue = "53491")]
     pub unsafe fn into_inner(self) -> T {
@@ -1092,7 +1092,7 @@ impl<T> MaybeUninit<T> {
     ///
     /// # Unsafety
     ///
-    /// It is up to the caller to guarantee that the the `MaybeUninit` really is in an initialized
+    /// It is up to the caller to guarantee that the `MaybeUninit` really is in an initialized
     /// state, otherwise this will immediately cause undefined behavior.
     #[unstable(feature = "maybe_uninit", issue = "53491")]
     pub unsafe fn get_ref(&self) -> &T {
@@ -1103,7 +1103,7 @@ impl<T> MaybeUninit<T> {
     ///
     /// # Unsafety
     ///
-    /// It is up to the caller to guarantee that the the `MaybeUninit` really is in an initialized
+    /// It is up to the caller to guarantee that the `MaybeUninit` really is in an initialized
     /// state, otherwise this will immediately cause undefined behavior.
     #[unstable(feature = "maybe_uninit", issue = "53491")]
     pub unsafe fn get_mut(&mut self) -> &mut T {

src/libcore/ptr.rs

@@ -120,7 +120,7 @@ pub use intrinsics::write_bytes;
 ///
 /// Additionally, if `T` is not [`Copy`], using the pointed-to value after
 /// calling `drop_in_place` can cause undefined behavior. Note that `*to_drop =
-/// foo` counts as a use because it will cause the the value to be dropped
+/// foo` counts as a use because it will cause the value to be dropped
 /// again. [`write`] can be used to overwrite data without causing it to be
 /// dropped.
 ///
@@ -371,7 +371,7 @@ pub(crate) unsafe fn swap_nonoverlapping_one<T>(x: *mut T, y: *mut T) {
 #[inline]
 unsafe fn swap_nonoverlapping_bytes(x: *mut u8, y: *mut u8, len: usize) {
     // The approach here is to utilize simd to swap x & y efficiently. Testing reveals
-    // that swapping either 32 bytes or 64 bytes at a time is most efficient for intel
+    // that swapping either 32 bytes or 64 bytes at a time is most efficient for Intel
     // Haswell E processors. LLVM is more able to optimize if we give a struct a
     // #[repr(simd)], even if we don't actually use this struct directly.
     //
@@ -1005,7 +1005,7 @@ impl<T: ?Sized> *const T {
     /// # Null-unchecked version
     ///
     /// If you are sure the pointer can never be null and are looking for some kind of
-    /// `as_ref_unchecked` that returns the `&T` instead of `Option<&T>, know that you can
+    /// `as_ref_unchecked` that returns the `&T` instead of `Option<&T>`, know that you can
     /// dereference the pointer directly.
     ///
     /// ```
@@ -1625,7 +1625,7 @@ impl<T: ?Sized> *mut T {
     /// # Null-unchecked version
     ///
     /// If you are sure the pointer can never be null and are looking for some kind of
-    /// `as_ref_unchecked` that returns the `&T` instead of `Option<&T>, know that you can
+    /// `as_ref_unchecked` that returns the `&T` instead of `Option<&T>`, know that you can
     /// dereference the pointer directly.
     ///
     /// ```

src/libstd/ffi/c_str.rs

@@ -1178,7 +1178,7 @@ impl CStr {
     ///
     /// If the contents of the `CStr` are valid UTF-8 data, this
     /// function will return a [`Cow`]`::`[`Borrowed`]`(`[`&str`]`)`
-    /// with the the corresponding [`&str`] slice. Otherwise, it will
+    /// with the corresponding [`&str`] slice. Otherwise, it will
     /// replace any invalid UTF-8 sequences with
     /// [`U+FFFD REPLACEMENT CHARACTER`][U+FFFD] and return a
     /// [`Cow`]`::`[`Owned`]`(`[`String`]`)` with the result.

src/libstd/lib.rs

@@ -495,7 +495,7 @@ mod memchr;
 // compiler
 pub mod rt;
 
-// Pull in the the `stdsimd` crate directly into libstd. This is the same as
+// Pull in the `stdsimd` crate directly into libstd. This is the same as
 // libcore's arch/simd modules where the source of truth here is in a different
 // repository, but we pull things in here manually to get it into libstd.
 //