Remove spurious backticks detected by rustdoc::unescaped_backticks

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: ojeda

library/core/src/ops/deref.rs

@@ -282,7 +282,7 @@ impl<T: ?Sized> DerefMut for &mut T {
 /// FIXME(deref_patterns): The precise semantics are undecided; the rough idea is that
 /// successive calls to `deref`/`deref_mut` without intermediate mutation should be
 /// idempotent, in the sense that they return the same value as far as pattern-matching
-/// is concerned. Calls to `deref`/`deref_mut`` must leave the pointer itself likewise
+/// is concerned. Calls to `deref`/`deref_mut` must leave the pointer itself likewise
 /// unchanged.
 #[unstable(feature = "deref_pure_trait", issue = "87121")]
 #[lang = "deref_pure"]

library/core/src/ptr/mod.rs

@@ -786,7 +786,7 @@ where
 ///
 /// The caller must also ensure that the memory the pointer (non-transitively) points to is never
 /// written to (except inside an `UnsafeCell`) using this pointer or any pointer derived from it. If
-/// you need to mutate the pointee, use [`from_mut`]`. Specifically, to turn a mutable reference `m:
+/// you need to mutate the pointee, use [`from_mut`]. Specifically, to turn a mutable reference `m:
 /// &mut T` into `*const T`, prefer `from_mut(m).cast_const()` to obtain a pointer that can later be
 /// used for mutation.
 ///