Address review comments

Author: lukaslueg

clippy_lints/src/size_of_ref.rs

@@ -66,7 +66,7 @@ impl LateLintPass<'_> for SizeOfRef {
                 expr.span,
                 "argument to `std::mem::size_of_val()` is a reference to a reference",
                 None,
-                "dereference the argument to `std::mem::size_of_val()` to get the size of the value instead of the generic size of any reference-type",
+                "dereference the argument to `std::mem::size_of_val()` to get the size of the value instead of the size of the reference-type",
             );
         }
     }

tests/ui/size_of_ref.stderr

@@ -4,7 +4,7 @@ error: argument to `std::mem::size_of_val()` is a reference to a reference
 LL |     size_of_val(&&x);
    |     ^^^^^^^^^^^^^^^^
    |
-   = help: dereference the argument to `std::mem::size_of_val()` to get the size of the value instead of the generic size of any reference-type
+   = help: dereference the argument to `std::mem::size_of_val()` to get the size of the value instead of the size of the reference-type
    = note: `-D clippy::size-of-ref` implied by `-D warnings`
 
 error: argument to `std::mem::size_of_val()` is a reference to a reference
@@ -13,15 +13,15 @@ error: argument to `std::mem::size_of_val()` is a reference to a reference
 LL |     size_of_val(&y);
    |     ^^^^^^^^^^^^^^^
    |
-   = help: dereference the argument to `std::mem::size_of_val()` to get the size of the value instead of the generic size of any reference-type
+   = help: dereference the argument to `std::mem::size_of_val()` to get the size of the value instead of the size of the reference-type
 
 error: argument to `std::mem::size_of_val()` is a reference to a reference
   --> $DIR/size_of_ref.rs:25:9
    |
 LL |         std::mem::size_of_val(&self) + (std::mem::size_of::<u8>() * self.data.capacity())
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: dereference the argument to `std::mem::size_of_val()` to get the size of the value instead of the generic size of any reference-type
+   = help: dereference the argument to `std::mem::size_of_val()` to get the size of the value instead of the size of the reference-type
 
 error: aborting due to 3 previous errors