Fix all spelling mistakes in history by typos tool

ostd/src/cpu/local/cell.rs

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MPL-2.0
 
-//! The implementaion of CPU-local variables that have inner mutability.
+//! The implementation of CPU-local variables that have inner mutability.
 
 use core::cell::UnsafeCell;
 
@@ -35,7 +35,7 @@ use crate::arch;
 ///
 ///     let _irq_guard = ostd::trap::disable_local_irq();
 ///     println!("1st FOO VAL: {:?}", FOO.load());
-///     // No suprises here, the two accesses must result in the same value.
+///     // No surprises here, the two accesses must result in the same value.
 ///     println!("2nd FOO VAL: {:?}", FOO.load());
 /// }
 /// ```

ostd/src/cpu/local/cpu_local.rs

@@ -58,7 +58,7 @@ macro_rules! cpu_local {
 
 /// CPU-local objects.
 ///
-/// CPU-local objects are instanciated once per CPU core. They can be shared to
+/// CPU-local objects are instantiated once per CPU core. They can be shared to
 /// other cores. In the context of a preemptible kernel task, when holding the
 /// reference to the inner object, the object is always the one in the original
 /// core (when the reference is created), no matter which core the code is
@@ -169,7 +169,7 @@ impl<T: 'static + Sync> CpuLocal<T> {
 }
 
 // SAFETY: At any given time, only one task can access the inner value `T` of a
-// CPU-local variable if `T` is not `Sync`. We guarentee it by disabling the
+// CPU-local variable if `T` is not `Sync`. We guarantee it by disabling the
 // reference to the inner value, or turning off preemptions when creating
 // the reference.
 unsafe impl<T: 'static> Sync for CpuLocal<T> {}