Define max_columns option as a display option

[stijnvanhoey]

To overcome issue pandas._config.config.OptionError: 'Pattern matched multiple keys' in pandas 1.4.0, one need to specify display of render when defining the option.

[aerispaha]

Hi @stijnvanhoey, thanks for this patch! I wonder if we even need to do this Pandas display.max_columns configuration. It seems like it might be a better idea to let the users manipulate any Pandas display options in their own environment.

Regardless, I'm okay with this change. I just want to see why the documentation build is failing before merging these changes.

[stijnvanhoey]

Thanks, it was only a very small fix :-)

if we even need to do this Pandas display.max_columns configuration. It seems like it might be a better idea to let the users manipulate any Pandas display options in their own environment.

I do agree.

With respect to the documentation bug, seems that one need to specify the exact version of mistune in the doc requirements (version 2 removed the BlockGrammar).