Add leading example sentence for warning references in range [C6311, C6400]

Author: Rageking8

docs/code-quality/c6328.md

@@ -18,6 +18,8 @@ Code analysis name: `FORMAT_SIZE_MISMATCH`
 
 ## Example
 
+The following example generates C6328:
+
 ```cpp
 #include <cstdio>
 

docs/code-quality/c6340.md

@@ -18,6 +18,8 @@ Code analysis name: `FORMAT_SIGN_MISMATCH`
 
 ## Example
 
+The following example generates C6340:
+
 ```cpp
 #include <cstdio>
 

docs/code-quality/c6389.md

@@ -21,6 +21,8 @@ Code analysis name: `MARK_INTERNAL_OR_MISSING_COMMON_DECL`
 
 ## Example
 
+The following example generates C6389:
+
 ```cpp
 // A.h
 struct X;

docs/code-quality/c6390.md

@@ -17,6 +17,8 @@ Code analysis name: `NO_NULLCHECK_FOR_THIS`
 
 ## Example
 
+The following example generates C6390:
+
 ```cpp
 struct X
 {

docs/code-quality/c6395.md

@@ -17,6 +17,8 @@ Code analysis name: `EVAL_ORDER_CHANGE`
 
 ## Example
 
+The following example generates C6395:
+
 ```cpp
 void foo(int* a, int i)
 {

docs/code-quality/c6396.md

@@ -17,6 +17,8 @@ This check ignores character literals because `buffer_size += sizeof(UNICODE_NUL
 
 ## Example
 
+The following example generates C6396:
+
 ```cpp
 void f()
 {  

docs/code-quality/c6397.md

@@ -17,6 +17,8 @@ The address-of operator returns the address of its operand. This value should ne
 
 ## Example
 
+The following example generates C6397:
+
 ```cpp
 bool isNull(int *a)
 {  

docs/code-quality/c6398.md

@@ -17,6 +17,8 @@ The address-of operator returns the address of its operand. This value should ne
 
 ## Example
 
+The following example generates C6398:
+
 ```cpp
 struct A { int* x; };