bug#62732: 29.0.60; uniquify-trailing-separator-p affects any buffer whose name matches a dir in CWD

[Stefan Monnier]

> I prefer (1), because it avoids requesting the callers to remember to
> ensure that every directory ends in a slash.

OK, pushed.  It is admittedly closer to the current semantics, so in
a sense it's a step in the right direction and we could still change it
later if/when needed.

Thank you very much, Spencer,


        Stefan