Update SharedPtr.md

Author: jen3andruska

docs/reference/api/platform/SharedPtr.md

@@ -1,10 +1,9 @@
 ## Shared Pointer
 
-A shared pointer is a "smart" pointer that retains ownership of an object using
+A shared pointer is a "smart" pointer that retains ownership of an object by using
 reference counting accross all smart pointers referencing that object.
 
-It is similar to the `std::shared_ptr` class introduced in C++11,
-however this is not a compatible implementation (no weak pointer, no make_shared, no custom deleters, etc.)
+It is similar to the `std::shared_ptr` class introduced in C++11. However, this is not a compatible implementation, as there are no weak pointers, no `make_shared`, no custom deleters, and so on.
 
 Usage: `SharedPtr<Class> ptr(new Class())`