Remove shebang, code tidy, as per @jlee-r7's gripes

lib/rex/post/meterpreter/ui/console/command_dispatcher/extapi/clipboard.rb

@@ -62,8 +62,7 @@ class Console::CommandDispatcher::Extapi::Clipboard
       when "-h"
         print_clipboard_get_data_usage
         return true
-      end
-    }
+      end }
 
     # currently we only support text values
     results = client.extapi.clipboard.get_data(download_content)

lib/rex/post/meterpreter/ui/console/command_dispatcher/extapi/window.rb

@@ -48,7 +48,7 @@ class Console::CommandDispatcher::Extapi::Window
       "Enumerate the windows on the target.\n\n" +
       "Enumeration returns the Process ID and Window Handle for each window\n" +
       "found. The Window Handle can be used for further calls to window_enum\n" +
-      "or the the railgun API.\n" +
+      "or the railgun API.\n" +
       @@window_enum_opts.usage +
       "Note: Not all windows can be enumerated. An attempt to enumerate\n" +
       "      the children of such a window will result in a failure with the\n"+
@@ -80,7 +80,7 @@ class Console::CommandDispatcher::Extapi::Window
 
     windows = client.extapi.window.enumerate(include_unknown, parent_window)
 
-    header = parent_window.nil? ? "Top-level windows" : "Child windows of #{parent_window}"
+    header = parent_window ? "Child windows of #{parent_window}" : "Top-level windows"
 
     table = Rex::Ui::Text::Table.new(
       'Header'    => header,