Merge pull request #487 from AndrejMitrovic/RemoveHiddenFunc

Make note that HiddenFuncError is a deprecated feature.

function.dd

@@ -571,6 +571,11 @@ void main() {
   foo(new B);
 }
 ---
+        $(P Note that the this current runtime behavior is deprecated.
+        The compiler will currently emit a compile-time error for the
+        above test-case unless the ($(B -d)) deprecation switch is enabled.
+        In the future this deprecated runtime-only checking feature will be removed.)
+
         $(P If an $(CODE HiddenFuncError) exception is thrown in your program,
         the use of overloads and overrides needs to be reexamined in the
         relevant classes.)
@@ -1861,8 +1866,8 @@ $(H3 $(LNAME2 pseudo-member, Uniform Function Call Syntax (UFCS)))
         // it's automatically rewritten to 'func(obj)'
         ---
 
-	$(P This provides a way to add functions to a class 
-	externally as if they were public final member functions. 
+	$(P This provides a way to add functions to a class
+	externally as if they were public final member functions.
 	)
 
         $(P It also works with $(D @property) functions:)