removing #:renamer

[Thien-Thi Nguyen]

A while back, i added #:renamer to the `define-module' processing.
Since then, `define-module' has gained #:prefix, which is nicer (IMHO),
so now i'm thinking of removing #:renamer for Guile 1.9 (and thus 2.0).
(Specifically: by 21-February.)

This goes along with the general philosophy of "if anything should be
removed, especially backward incompatibly, do it on a major release".
In practice, this means if you have code like:

  #:use-module (FOO #:renamer (symbol-prefix-proc 'BAR))

then you can equally express that as:

  #:use-module (FOO #:prefix BAR)

That seemed/seems to be the large majority of use cases that i've seen.
Does anyone use #:renamer differently?

thi