(tit-process-header): Use

(tit-process-header): Use
buffer-substring-no-properties instead of buffer-substring.
(tit-process-body): Likewise.
(tsang-quick-converter): Handle superfluous CR at eol.
(py-converter): Use buffer-substring-no-properties instead of
buffer-substring.  Handle superfluous CR at eol.
(ziranma-converter): Likewise
(ctlau-converter): Likewise.
(miscdic-convert): Read a file without eol conversion.