Modify rule S6466: Fix code examples

rules/S6466/java/rule.adoc

@@ -62,7 +62,7 @@ Still, accessing an array with its size as an index is not correct:
 [source,java,diff-id=2,diff-type=noncompliant]
 ----
   void nonCompliant(int[] arr) {
-    System.out.println(arr[arr.length]); # Noncompliant: Indexing starts at 0, hence array.length will always be an invalid index.
+    System.out.println(arr[arr.length]); // Noncompliant: Indexing starts at 0, hence array.length will always be an invalid index.
   }
 ----
 
@@ -71,8 +71,8 @@ Still, accessing an array with its size as an index is not correct:
 [source,java,diff-id=2,diff-type=compliant]
 ----
   void compliant(int[] arr) {
-    # We can make sure arr is non-empty before trying to access its last element.
-    if (array.length > 0) {
+    // We can make sure arr is non-empty before trying to access its last element.
+    if (arr.length > 0) {
       System.out.println(arr[arr.length - 1]);
     } else {
       System.out.println("Empty array!");