Adding a few more overrides that -Wsuggest-override caught but clang-tidy didn't

ACSLTermOrPredicate.cpp

@@ -5396,7 +5396,7 @@ public:
       _addresses = _endAddresses = NULL;
       return result;
     }
-  virtual RuleResult* clone() const
+  RuleResult* clone() const override
     { return new TermOrPredicateMemoryExtension(*this); }
 };
 
@@ -5460,7 +5460,7 @@ public:
       _commonType = NULL;
       return result;
     }
-  virtual RuleResult* clone() const { return new TermOrPredicateList(*this); }
+  RuleResult* clone() const override { return new TermOrPredicateList(*this); }
 };
 
 void

ACSLToken.h

@@ -40,9 +40,9 @@ namespace Acsl { namespace DLexer {
  *  AbstractToken.
  */
 #define DefineStandardTokenMethods(Type)                                       \
-  virtual AbstractToken* _clone() const                                        \
+  AbstractToken* _clone() const override                                       \
     { return new Type(*this); }                                                \
-  Type* clone() const                                                          \
+  Type* clone() const override                                                 \
     { return (Type*) _clone(); }
 
 class Token;

DescentParse.h

@@ -358,10 +358,10 @@ public:
     TParseState(const thisType& source)
       : inherited(source), _readMethod(source._readMethod),
         _object(source._object) {}
-    virtual VirtualParseState* clone() const { return new thisType(*this); }
+    VirtualParseState* clone() const override { return new thisType(*this); }
 
-    virtual ReadResult operator()(
-        TStateStack<TypeArguments>& stateStack, ParseArgument& arguments) 
+    ReadResult operator()(
+        TStateStack<TypeArguments>& stateStack, ParseArgument& arguments) override
       { return (_object->*_readMethod)(stateStack, arguments); }
     const ReadPointerMethod& getStateMethod() const { return _readMethod; }
     void change(TypeObject& object, ReadPointerMethod readMethod, int point)