docs: further review comments

docs/language/ql-training/cpp/program-representation-cpp.rst

@@ -21,16 +21,16 @@ Agenda
 
 .. resume slides
 
-AST classes
-===========
+AST CodeQL classes
+==================
 
-Important AST classes include:
+Important AST CodeQL classes include:
 
 - ``Expr``: expressions such as assignments, variable references, function calls, ...
 - ``Stmt``: statements such as conditionals, loops, try statements, ... 
 - ``DeclarationEntry``: places where functions, variables or types are declared and/or defined
 
-These three (and all other AST classes) are subclasses of ``Element``.
+These three (and all other AST CodeQL classes) are subclasses of ``Element``.
 
 Symbol table
 ============
@@ -64,7 +64,7 @@ Working with functions
 
 Functions are represented by the Function class. Each declaration or definition of a function is represented by a ``FunctionDeclarationEntry``.
 
-Calls to functions are modeled by class ``Call`` and its subclasses:
+Calls to functions are modeled by CodeQL class ``Call`` and its subclasses:
 
 - ``Call.getTarget()`` gets the declared target of the call; undefined for calls through function pointers
 - ``Function.getACallToThisFunction()`` gets a call to this function