Rollup merge of #43891 - Fourchaux:master, r=steveklabnik

Fix typos & us spellings

Fixing some typos and non en-US spellings.

(Update of PR https://github.com/rust-lang/rust/pull/42812 )

src/liballoc/allocator.rs

@@ -293,7 +293,7 @@ impl Layout {
     /// Creates a layout describing the record for `self` followed by
     /// `next` with no additional padding between the two. Since no
     /// padding is inserted, the alignment of `next` is irrelevant,
-    /// and is not incoporated *at all* into the resulting layout.
+    /// and is not incorporated *at all* into the resulting layout.
     ///
     /// Returns `(k, offset)`, where `k` is layout of the concatenated
     /// record and `offset` is the relative location, in bytes, of the
@@ -528,7 +528,7 @@ pub unsafe trait Alloc {
     ///   to allocate that block of memory.
     unsafe fn dealloc(&mut self, ptr: *mut u8, layout: Layout);
 
-    /// Allocator-specific method for signalling an out-of-memory
+    /// Allocator-specific method for signaling an out-of-memory
     /// condition.
     ///
     /// `oom` aborts the thread or process, optionally performing
@@ -539,7 +539,7 @@ pub unsafe trait Alloc {
     /// unsatisfied allocation request (signaled by an error such as
     /// `AllocErr::Exhausted`), and wish to abandon computation rather
     /// than attempt to recover locally. Such clients should pass the
-    /// signalling error value back into `oom`, where the allocator
+    /// signaling error value back into `oom`, where the allocator
     /// may incorporate that error value into its diagnostic report
     /// before aborting.
     ///

src/liballoc/btree/node.rs

@@ -763,7 +763,7 @@ impl<Node: Copy, Type> Clone for Handle<Node, Type> {
 }
 
 impl<Node, Type> Handle<Node, Type> {
-    /// Retrieves the node that contains the edge of key/value pair this handle pointes to.
+    /// Retrieves the node that contains the edge of key/value pair this handle points to.
     pub fn into_node(self) -> Node {
         self.node
     }

src/liballoc/raw_vec.rs

@@ -544,12 +544,12 @@ impl<T, A: Alloc> RawVec<T, A> {
     /// Attempts to ensure that the buffer contains at least enough space to hold
     /// `used_cap + needed_extra_cap` elements. If it doesn't already have
     /// enough capacity, will reallocate in place enough space plus comfortable slack
-    /// space to get amortized `O(1)` behaviour. Will limit this behaviour
+    /// space to get amortized `O(1)` behavior. Will limit this behaviour
     /// if it would needlessly cause itself to panic.
     ///
     /// If `used_cap` exceeds `self.cap()`, this may fail to actually allocate
     /// the requested space. This is not really unsafe, but the unsafe
-    /// code *you* write that relies on the behaviour of this function may break.
+    /// code *you* write that relies on the behavior of this function may break.
     ///
     /// Returns true if the reallocation attempt has succeeded, or false otherwise.
     ///