man: Fix grammar in dpkg-deb(1) man page

Reported-by: Dilyan Palauzov <dilyan.palauzov@aegee.org>

man/dpkg-deb.1

@@ -67,7 +67,7 @@ Unless you specify
 .BR \-\-nocheck ", " dpkg\-deb "
 will read
 .B DEBIAN/control
-and parse it. It will check it for syntax errors and other problems,
+and parse it. It will check the file for syntax errors and other problems,
 and display the name of the binary package being built.
 .B dpkg\-deb
 will also check the permissions of the maintainer scripts and other