Re: Minor bug in git branch --set-upstream-to adding superfluous branch section to config

> I think what happens is that the config editor runs
> through the files linearly, munging whatever lines necessary for the
> requested operation, and leaving everything else untouched (as it must,
> to leave comments and whitespace intact). But it does not keep a
> look-behind buffer to realize that a section name is now obsolete (which
> we don't know until we get to the next section, or to EOF). In the worst
> case, this buffer can grow arbitrarily large, like:
>
>   [foo]
>   # the above section is now empty
>   # but we have to read through all of
>   # these comments to actually
>   # realize it
>   [bar]