Apply suggestions from code review

Co-authored-by: John Hui <[email protected]>

Author: egorzhdan

documentation/cxx-interop/safe-interop/index.md

@@ -341,8 +341,7 @@ void copyView(View view1 [[clang::lifetime_capture_by(view2)]], View &view2) {
 }
 ```
 
-In this example, `view2` will have get all of the lifetime dependencies of `view1`
-after a call to `copyView`. a
+Here, `view2` inherits the lifetime dependencies of `view1`, so callers of `copyView` must ensure that whatever they pass as `view2` does not outlive `view1`.
 
 We can use this annotation to specify that a parameter's lifetime dependencies are captured by the implicit `this` object, or
 conversely, that an inout argument captures the lifetime dependencies of `this`:
@@ -392,8 +391,8 @@ types, and the user with a safe and convenient interface to those imported APIs.
 ### C++ `std::span` Support
 
 APIs taking or returning C++'s `std::span` with sufficient lifetime
-annotations will automatically get overloads taking/returning Swift
-`Span`.
+annotations will automatically get safe overloads take or return Swift
+`Span` and `MutableSpan` types.
 
 The following table summarizes the generated convenience overloads: