cat: squash s/it/is/ typo (libarchive#2292)

Closes: libarchive#2128

Signed-off-by: Emil Velikov <[email protected]>

Author: evelikov

cat/bsdcat.1

@@ -39,7 +39,7 @@ expands files to standard output.
 .Nm
 typically takes a filename as an argument or reads standard input when used in a
 pipe.
-In both cases decompressed data it written to standard output.
+In both cases decompressed data is written to standard output.
 .Sh EXAMPLES
 To decompress a file:
 .Pp