Add a relop to the end of a relop_list in pipe notation with collector on the right.
# S4 method for ANY,relop_list
apply_right_S4(pipe_left_arg, pipe_right_arg,
pipe_environment, left_arg_name, pipe_string, right_arg_name)
relop operation tree
relop_list
environment to evaluate in.
name, if not NULL name of left argument.
character, name of pipe operator.
name, if not NULL name of right argument.
result