chore: fix some typos in comments

Signed-off-by: forcedebug <forcedebug@outlook.com>

clippy_lints/src/implied_bounds_in_impls.rs

@@ -24,7 +24,7 @@ declare_clippy_lint! {
     ///
     /// ### Limitations
     /// This lint does not check for implied bounds transitively. Meaning that
-    /// it does't check for implied bounds from supertraits of supertraits
+    /// it doesn't check for implied bounds from supertraits of supertraits
     /// (e.g. `trait A {} trait B: A {} trait C: B {}`, then having an `fn() -> impl A + C`)
     ///
     /// ### Example

clippy_lints/src/methods/unused_enumerate_index.rs

@@ -78,7 +78,7 @@ pub(super) fn check(cx: &LateContext<'_>, call_expr: &Expr<'_>, recv: &Expr<'_>,
         && match_def_path(cx, enumerate_defid, &CORE_ITER_ENUMERATE_METHOD)
     {
         // Check if the tuple type was explicit. It may be the type system _needs_ the type of the element
-        // that would be explicited in the closure.
+        // that would be explicitly in the closure.
         let new_closure_param = match find_elem_explicit_type_span(closure.fn_decl) {
             // We have an explicit type. Get its snippet, that of the binding name, and do `binding: ty`.
             // Fallback to `..` if we fail getting either snippet.

clippy_lints/src/size_of_ref.rs

@@ -28,7 +28,7 @@ declare_clippy_lint! {
     ///     fn size(&self) -> usize {
     ///         // Note that `&self` as an argument is a `&&Foo`: Because `self`
     ///         // is already a reference, `&self` is a double-reference.
-    ///         // The return value of `size_of_val()` therefor is the
+    ///         // The return value of `size_of_val()` therefore is the
     ///         // size of the reference-type, not the size of `self`.
     ///         std::mem::size_of_val(&self)
     ///     }