Fix internal conflicts in CODING_GUIDELINES.md.

CODING_GUIDELINES.md

@@ -59,13 +59,17 @@ default:
 
 #### c. Blocks in switch's case labels ####
 ```c++
-switch (var)
+switch (var) {
 case 1: {
         //declare local variables
         //code
     }
-case 2:
+    break;
+case 2: {
+        //declare local variables
         //code
+    }
+    break;
 default:
     //code
 }
@@ -93,7 +97,7 @@ if (condition)
     a = a + b;
 ```
 
-One acceptable exception to this **can be** `return` or `break` statements, provided that the test condition isn't very long. However you can choose to use the first rule instead.
+One acceptable exception to this **can be** `return`, `break` or `continue` statements, provided that the test condition isn't very long. However you can choose to use the first rule instead.
 ```c++
 a = myFunction();
 b = a * 1500;