Wrong virtualenv export variable

[bishop527]

The following text is in the Lower Level: virtualenv section
"or change the interpreter globally with an env variable in ~/.bashrc:

$ export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python2.7"

Since this section is talking about virtualenv, not virtualenvwrapper, the export should be
$ export VIRTUALENV_PYTHON=/usr/bin/python2.7