ANSI escape sequences don't work with PDF outputs

[mgeier]

Example notebooks can be found at https://github.com/spatialaudio/nbsphinx/tree/master/doc

For example, this:

python3 -m nbconvert --execute --to pdf allow-errors-per-cell.ipynb

... produces this:

... while it should look a bit more like this (which was produced by nbsphinx's LaTeX output):

Those two don't even create PDF files, they lead to some errors during the LaTeX run:

python3 -m nbconvert --to pdf pre-executed.ipynb
python3 -m nbconvert --execute --to pdf code-cells.ipynb

Nbconvert version: master

Possibly related:
#1068, #1071, #1077

[MSeal]

I'll need to double check what went wrong there, thanks for raising. If you find the offending line for the raises-exception feel free to add the fix in a PR. The LaTeX story is more of a mess and I haven't had time to try and help there for a while.

[aarchiba]

Could this be fixed by #1181 ?

[mgeier]

@aarchiba Nope. #1181 was only a partial fix. The block traceback_line still has a strip_ansi | escape_latex which should be replaced with escape_latex | ansi2latex.