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The debian plugin calls which to determine whether aptitude & sudo are
installed.  However, if these are not installed then the error output
from which will be output.  Since this isn't really an error condition,
this commit updates the which calls to pipe stderr to stdout, thus
hiding the error messages.

http://blog.wyeworks.com/2011/12/27/bundle-exec-rails-executes-bundler-setup-3-times
http://yehudakatz.com/2011/05/30/gem-versioning-and-bundler-doing-it-right/

Evaluates $(rbfu --init --auto) if rbfu is installed on the system,
also has a custom rbfu-rubies method which lists the installed
rubies which are available to rbfu.

For compatibility with themes, also creates the rvm_prompt_info
function, so existing themes should work out of the box.

Info from http://procps.sourceforge.net/faq.html .

According to @graywh's comment on:
https://github.com/sstephenson/rbenv/issues/185

Make the $apt_pref variable evaluatet at alias expansion by using single-quotes instad of double quotes

The heroku command should not be executed via bundler, see:
https://github.com/heroku/heroku/issues/173 

Detects the platform using "uname", and sets the alias accordingly.
If you are using Linux, this assumes that you have created a
symbolic link to /usr/bin/sublime_text.

^/branches/featurename
^/releases/Release-vx.y
^/trunk

- avoid rr as it is mostly used for restart rails server