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 Development version
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This document describes in-flight development work.

The CodeMirror js library has been updated fron 2.23 to 2.32 
this might induce a few changes in behavior of keymaps in the notebook, 
especially intenting/deindenting blocks that is now bound to Ctrl+] and ctr+[

* Exception types can now be displayed with a custom traceback, by defining a
  ``_render_traceback_()`` method which returns a list of strings, each
  containing one line of the traceback.