This is a reponse to the problem of having really long lines in
Markdown cells, which makes the content difficult to read. Users
want wide code cells, so we don't want to narrow everything. The
solution here is to give a prompt area to the heading/md cells
to narrow their content area slightly. The only problem is that
this makes it more difficult to distinguish between output
and md content that follows that output. The solve this, we are
adding a narrow line between output and following md.
stateless-ification of function that was using module level
variable to share data.
Now varaible are passed around, and usage of replace math
require user to pass a return value of remove_math around
small typo prevented the previous implementation from working.
This also moves the rendering to the 'render' method,
away from set_rendered.
closes#3053
(again)
Matthias Bussonnier
Brian E. Granger
MinRK
Jessica B. Hamrick