Elijah Newren <newren@xxxxxxxxx> writes: > Given that t/README explicitly shows examples of space-separated lists > of numbers, I'm worried we're breaking long-built expectations of > other developers by changing IFS here. Perhaps I could instead add > the following paragraph to t/README: Unlike something that would affect end-users, I think it is OK to break backward compatibility one-way. If you suddenly forbid spaces and force our developers to use comma and nothing else, in muscle memory of their fingers and/or in their scripts, in a version merged to 'master', as long as their new habit and updated scripts use comma consistently, they work fine on 'maint', right? If there is no such "works on both sides of the flag day" choice, it is a different story, of course, but comma should work fine for us in this case. Thanks.