fix mixup of indentation strategies inside same codeblocks

CppCoreGuidelines.md

@@ -1899,6 +1899,7 @@ Passing a shared smart pointer (e.g., `std::shared_ptr`) implies a run-time cost
 
 **Example**:
 
+
 	template<class T>
 	auto square(T t) { return t*t; }
 
@@ -12110,11 +12111,11 @@ When using exceptions as your error handling mechanism, always document this beh
 
 If you define a destructor, you should not use the compiler-generated copy or move operation; you probably need to define or suppress copy and/or move.
 
-
     class X {
         HANDLE hnd;
         // ...
     public:
+
  	   ~X() { /* custom stuff, such as closing hnd */ }
 
     	// suspicious: no mention of copying or moving -- what happens to hnd?