Fixed minor typo, suggested by Drew Perttula <drewp@bigasterisk.com>.
it doesn't exist, and truncated otherwise. If \var{buffering} is given,
\code{0} means unbuffered, and larger numbers specify the buffer size;
the default is \code{0}. If
-\var{compresslevel} is given, must be a number between \code{1} and
+\var{compresslevel} is given, it must be a number between \code{1} and
\code{9}; the default is \code{9}.
Add a \character{U} to mode to open the file for input with universal newline
support. Any line ending in the input file will be seen as a