fish2000 · November 20, 2023 12:03 · Mar 4, 2020 · Mar 4, 2020 · Mar 4, 2020
diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
@@ -6190,6 +6190,8 @@ A *polymorphic class* is a class that defines or inherits at least one virtual f
 
 ##### Example
 
+```c++
+
     class B { // GOOD: polymorphic class suppresses copying
     public:
         B(const B&) = delete;
@@ -6211,6 +6213,8 @@ A *polymorphic class* is a class that defines or inherits at least one virtual f
     D d;
     f(d);
 
+```
+
 ##### Note
 
 If you need to create deep copies of polymorphic objects, use `clone()` functions: see [C.130](#Rh-copy).
@@ -6238,6 +6242,8 @@ The compiler is more likely to get the default semantics right and you cannot im
 
 ##### Example
 
+```c++
+
     class Tracer {
         string message;
     public:
@@ -6250,6 +6256,8 @@ The compiler is more likely to get the default semantics right and you cannot im
         Tracer& operator=(Tracer&&) = default;
     };
 
+```
+
 Because we defined the destructor, we must define the copy and move operations. The `= default` is the best and simplest way of doing that.
 
 ##### Example, bad

diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
@@ -6165,6 +6165,8 @@ A *polymorphic class* is a class that defines or inherits at least one virtual f
 
 ##### Example, bad
 
+```c++
+
     class B { // BAD: polymorphic base class doesn't suppress copying
     public:
         virtual char m() { return 'B'; }
@@ -6184,6 +6186,8 @@ A *polymorphic class* is a class that defines or inherits at least one virtual f
     D d;
     f(d);
 
+```
+
 ##### Example
 
     class B { // GOOD: polymorphic class suppresses copying

diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md