Normalize description

Author: wvu

modules/exploits/multi/ftp/pureftpd_bash_env_exec.rb

@@ -15,12 +15,12 @@ def initialize(info = {})
     super(update_info(info,
       'Name'            => 'Pure-FTPd External Authentication Bash Environment Variable Code Injection',
       'Description'     => %q(
-        This module exploits the code injection flaw known as shellshock which leverages specially
+        This module exploits the code injection flaw known as Shellshock, which leverages specially
         crafted environment variables in Bash.
 
         Please note that this exploit specifically targets Pure-FTPd compiled with the --with-extauth
-        flag, and an external bash program for authentication. If the server is not set up this way,
-        understand that even if the operating system is vulnerable to 'Shellshock', it cannot be
+        flag, and an external Bash program for authentication. If the server is not set up this way,
+        understand that even if the operating system is vulnerable to Shellshock, it cannot be
         exploited via Pure-FTPd.
       ),
       'Author'          =>