Write each FILE to standard output, last line first. With no FILE, or when
FILE is \-, read standard input.
.PP
-Mandatory arguments to long options are mandatory for short options too.
+長いオプションでの必須の引き数は、短いオプションにおいても必須です。
.TP
\fB\-b\fP, \fB\-\-before\fP
attach the separator before instead of after