class input_line :UChar.t #OOChannel.obj_input_channel ->[text]OOChannel.obj_input_channel
new input_line input_obj creates the new input channel object
OOChannel.obj_input_channel which reads Unicode characters
from input_obj and output lines. All of CR, LF, CRLF, NEL, LS, PS,
as well as FF (formfeed) are recognised as a line separator.