ELSE IF END --> ELIF?

[Joe Horn]

If you type the following code into a CAS program...

Code:

(x)->BEGIN
  IF 1==2 THEN x:=3;
  ELSE IF 4==4 THEN x:=5; END; END;
  RETURN(x);
END;

... then exit the program editor, then edit the program again, you'll see that it has turned into this:

Code:

(x)->BEGIN  
  IF 1 = 2 THEN x:=3; 
  ELIF (4==4) THEN x:=5;  END ;  
  RETURN(x);  
END;

The ELSE IF turned into ELIF, and one of the ENDs is gone. I don't see ELIF mentioned in any of the docs. Is this new in rev 6030? Borrowed syntax from C or C++ perhaps?