Prevent errors when pressing arrow keys in an empty notebook #3126

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merged 2 commits into from Apr 6, 2013

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@dwyde

Notebook.get_selected_cell() returns null in an empty notebook.

As a bonus, there's a CasperJS test in #3125.

dwyde added some commits Apr 2, 2013
@minrk minrk merged commit bea4d94 into ipython:master Apr 6, 2013

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