Homebrew/homebrew — pull request #28246 by jasperla (2014-04-08 14:08:09+00:00)
Title: Unbreak scheme48

Missing comma results in:

==> ./configure--prefix=/usr/local/Cellar/scheme48/1.9.1 --enable-gc=bibop
Failed to execute: ./configure--prefix=/usr/local/Cellar/scheme48/1.9.1