Small desc update

Author: wchen-r7

modules/exploits/windows/fileformat/corelpdf_fusion_bof.rb

@@ -20,9 +20,9 @@ def initialize(info = {})
 			'Name'           => 'Corel PDF Fusion Stack Buffer Overflow',
 			'Description'    => %q{
 				This module exploits a stack-based buffer overflow vulnerability in version 1.11 of
-				Corel PDF Fusion. The vulnerability exists while handling XPS files with long entry
+				Corel PDF Fusion. The vulnerability exists while handling a XPS file with long entry
 				names. In order for the payload to be executed, an attacker must convince the target
-				user to open a specially crafted XPS file with Corel PDF Fusion. By doing so, an
+				user to open a specially crafted XPS file with Corel PDF Fusion. By doing so, the
 				attacker can execute arbitrary code as the target user.
 			},
 			'License'        => MSF_LICENSE,