file = *line [last-line]
line = line-text end
line-text = *(valid/invalid)
last-line = 1*(valid/invalid)
valid = %d32-126 / %d9
invalid = %d0-8 / %d11-12 /%d14-31 / %x7f-ffffffff
end = CRLF / LF / CR
CRLF = %d13.10
LF = %d10
CR = %d13