Extensions to the module name system in H2020

[Henning Thielemann]

On Mon, 30 Jul 2018, David Menendez wrote:

> Scenario 3 comes up every time this topic is discussed, but I don’t
> recall seeing even anecdotal evidence for it. Can anyone name two or
> more packages that define modules with the same name(s) such that one
> is a drop-in replacement for the other? That isn’t a rhetorical
> question. I’d honestly like to know if these exist.

stream-fusion provided a drop-in replacement for Data.List with improved 
list fusion.

My prelude2010 provides a drop-in replacement for Prelude, however the 
user actually wants to stick to prelude2010 in order to get the old 
Prelude signatures back.