pseudo.c: Fix pseudo format error message

Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
diff --git a/squashfs-tools/pseudo.c b/squashfs-tools/pseudo.c
index a3aebb5..cb74cf6 100644
--- a/squashfs-tools/pseudo.c
+++ b/squashfs-tools/pseudo.c
@@ -496,7 +496,7 @@
 	return TRUE;
 
 error:
-	ERROR("Pseudo definitions should be of format\n");
+	ERROR("Pseudo definitions should be of the format\n");
 	ERROR("\tfilename d mode uid gid\n");
 	ERROR("\tfilename m mode uid gid\n");
 	ERROR("\tfilename b mode uid gid major minor\n");