       lgets fileId ?varName?
              Reads  the  next  Tcl  list  from the file given by
              fileId and discards the terminating newline charac-
              ter.   This  command differs from the gets command,
              in that it reads Tcl lists rather than  lines.   If
              the list contains a newline, then that newline will
              be returned as part of the result.  Only a  newline
              not quoted as part of the list indicates the end of
              the list.  There is no  corresponding  command  for
              outputing  lists,  as  puts will do this correctly.
              If varName is specified, then the line is placed in
              the variable by that name and the return value is a
              count of the number of characters read (not includ-
              ing  the  newline).   If  the  end  of  the file is
              reached before reading any characters  then  -1  is
              returned and varName is set to an empty string.  If
              varName is not specified then the return value will
              be  the  line  (minus  the newline character) or an
              empty string if the end  of  the  file  is  reached
              before  reading  any  characters.   An empty string
              will also be returned if a line contains no charac-
              ters except the newline, so eof may have to be used
              to determine what really happened.

              This command is provided by Extended Tcl.
