Change tab into space to be standard compliant

Thanks to Brent and Dave for pointing it out.

Author: jinq102030

lib/msf/core/exploit/smtp_deliver.rb

@@ -242,12 +242,12 @@ def raw_send_recv(cmd, nsock=self.sock)
       # to dump it all.
       vprint_status("C: #{((cmd.length > 120) ? cmd[0,120] + "..." : cmd).strip}")
     end
-	begin
-		nsock.put(cmd)
-		res = nsock.get_once
-	rescue
-		return nil
-	end
+    begin
+      nsock.put(cmd)
+      res = nsock.get_once
+    rescue
+      return nil
+    end
     # Don't truncate the server output because it might be helpful for
     # debugging.
     vprint_status("S: #{res.strip}") if res