C++: Update QLDoc.

Author: geoffw0

cpp/ql/src/semmle/code/cpp/Function.qll

@@ -1,6 +1,5 @@
 /**
- * Provides classes for working with functions, including C++ constructors, destructors,
- * user-defined operators, and template functions.
+ * Provides classes for working with functions, including template functions.
  */
 
 import semmle.code.cpp.Location

cpp/ql/src/semmle/code/cpp/MemberFunction.qll

@@ -1,4 +1,9 @@
-import cpp
+/**
+ * Provides classes for working with C++ constructors, destructors,
+ * and user-defined operators.
+ */
+
+ import cpp
 
 /**
  * A C++ function declared as a member of a class [N4140 9.3]. This includes