idlwave-function-completion-adds-paren

idlwave-function-completion-adds-paren is a variable defined in `idlwave.el'.
Its value is

t

Documentation:
Non-nil means, completion automatically adds `(' after completed function.
nil means, don't add anything.
A value of `2' means, also add the closing parenthesis and position cursor
between the two.

You can customize this variable.