B: Print usage message to stderr

B's usage message redirects its stderr to stdout instead of vice versa.
Fix this.

Signed-off-by: Jordan Niethe <[email protected]>

Author: iamjpn

bin/B

@@ -15,7 +15,7 @@ fi
 
 if [ $# -eq 0 ]
 then
-	echo 'usage: B [+line] file...' 2>&1
+	echo 'usage: B [+line] file...' 1>&2
 	exit 1
 fi