4.4BSD snapshot (revision 8.1); add 1993 to copyright
written by Kirk McKusick; add Berkeley specific copyright notice
move the text of error messages from ERROR to the functionswhich generate them.
append a newline to unterminated last lines when reading text files
prevent error when ``readln'' used on partial last line in file
date and time created 80/10/30 00:34:46 by mckusick