First, here is the background to my question:
I am having problems seeing the visual editor once I upgraded to WP 3.5. For the record, I disabled all plug-ins, changed to the basic theme from my Genesis theme, etc, and it still didn't work. At any rate, I added the following to my wp-config file using Notepad++: define('SCRIPT_DEBUG', true); .
I know this is a temporary measure, but I need to leave it in the wp-config until WP is updated, or else I can't see the buttons for the visual or text editor.
So, my question is this: if this issue is resolved in an update to WordPress, will it overwrite my wp-config file, or will I have to go in and remove the line I added manually?