ipython/ipython — pull request #5108 by minrk (2014-02-12 19:46:16+00:00)
Title: require specifying the version for gh-pages

From now on, we are only maintaining one build of the IPython docs per major
release, e.g. latest 1.x docs served at ipython-doc/1/. This makes gh-pages no
longer guess based on git tag. To build the 1.x docs:

VERSION=1 make gh-pages