Trying to work on my plugin this evening has been frustrating because I keep on getting an error that says :

The plugin generated 303 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.

And I have been banging my head against a wall trying to fix this issue. Not really a big problem in that the plugin works as intended but if a wordpress user sees this error more than likely they will panic, deactivate and delete the plugin and run for the hills. How to solve it?