brewkit.rb changes ENV destructively, so lets not do that everytime a formula
is required. Now it's possible for other tools to require a formula
description without worrying about side-effects.
GNU GLOBAL is a source code tagging system that works the same way across
diverse environments (emacs, vi, less, bash, web browser, etc). You can locate
specified objects in source files and move there easily. It is useful for
hacking a large project containing many subdirectories, many #ifdef and many
main() functions. It is similar to ctags or etags but is different from them
at the point of independence of any editor. It runs on a UNIX(POSIX)
compatible operating system like GNU and BSD.
