[[!comment format=mdwn username="spwhitton" subject="comment 2" date="2015-08-05T21:29:04Z" content=""" Thanks for the input! I agree that generalising to lines under sections is a good idea, but I don't think it can be as simple as a property taking the full section header and the full settings line. That's because there is a need to update the values of keys under sections: in the example LightDM case, the line `autologin-user=someone` must *replace* any `autologin-user=someone_else`. So the function needs to know the key, not just the whole line. So to generalise containsConfPair, it might take a section header, key, value and a specification of what kind of config file it is. That specification would be a type containing the comment character, the formatting of section headers and the use of spaces, colons or equals signs between keys and values. What do you think to this? """]]