Trim out whitespace when saving a Wygwam field

wygwam-trim

In system/expressionengine/third_party/wygwam/ft.wygwam.php, find this in the beginning of the save() function:

		// Clear out if just whitespace
		if (! $data || preg_match('/^\s*(<\w+>\s*(&nbsp;)*\s*<\/\w+>|<br \/>)?\s*$/s', $data))
		{
			return '';
		}

And replace it with this:

		// Trim out any whitespace/empty tags
		$data = preg_replace('/^(\s|<(\w+)>(&nbsp;|\s)*<\/\2>|<br \/>)*/', '', $data);
		$data = preg_replace('/(\s|<(\w+)>(&nbsp;|\s)*<\/\2>|<br \/>)*$/', '', $data);