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/libstd/ffi/c_str.rs

@@ -830,7 +830,7 @@ impl CStr {
     ///
     /// It is your responsibility to make sure that the underlying memory is not
     /// freed too early. For example, the following code will cause undefined
-    /// behaviour when `ptr` is used inside the `unsafe` block:
+    /// behavior when `ptr` is used inside the `unsafe` block:
     ///
     /// ```no_run
     /// use std::ffi::{CString};

src/libstd/ffi/os_str.rs

@@ -123,7 +123,7 @@ impl OsString {
 
     /// Creates a new `OsString` with the given capacity.
     ///
-    /// The string will be able to hold exactly `capacity` lenth units of other
+    /// The string will be able to hold exactly `capacity` length units of other
     /// OS strings without reallocating. If `capacity` is 0, the string will not
     /// allocate.
     ///

src/libstd/sync/once.rs

@@ -387,7 +387,7 @@ impl Drop for Finish {
 impl OnceState {
     /// Returns whether the associated [`Once`] has been poisoned.
     ///
-    /// Once an initalization routine for a [`Once`] has panicked it will forever
+    /// Once an initialization routine for a [`Once`] has panicked it will forever
     /// indicate to future forced initialization routines that it is poisoned.
     ///
     /// [`Once`]: struct.Once.html

src/libstd/sys/redox/args.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Global initialization and retreival of command line arguments.
+//! Global initialization and retrieval of command line arguments.
 //!
 //! On some platforms these are stored during runtime startup,
 //! and on some they are retrieved from the system on demand.

src/libstd/sys/unix/args.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Global initialization and retreival of command line arguments.
+//! Global initialization and retrieval of command line arguments.
 //!
 //! On some platforms these are stored during runtime startup,
 //! and on some they are retrieved from the system on demand.

src/libstd/thread/mod.rs

@@ -560,7 +560,7 @@ pub fn current() -> Thread {
 /// implementing low-level shared resources or synchronization primitives.
 ///
 /// However programmers will usually prefer to use, [`channel`]s, [`Condvar`]s,
-/// [`Mutex`]es or [`join`] for their synchronisation routines, as they avoid
+/// [`Mutex`]es or [`join`] for their synchronization routines, as they avoid
 /// thinking about thread scheduling.
 ///
 /// Note that [`channel`]s for example are implemented using this primitive.

src/libstd/time/mod.rs

@@ -112,7 +112,7 @@ pub struct Instant(time::Instant);
 ///            println!("{}", elapsed.as_secs());
 ///        }
 ///        Err(e) => {
-///            // an error occured!
+///            // an error occurred!
 ///            println!("Error: {:?}", e);
 ///        }
 ///    }