MAINT: update quantecon-book-theme=0.2.0

[mmcky]

This PR updates to quantecon-book-theme=0.2.0

[mmcky]

@shlff this is a build of: https://python-programming.quantecon.org/intro.html using the latest quantecon-book-theme.

@AakashGfude has done some nice work on refactoring our theme and adding some new features.

It would be great if you could spend a bit of time comparing the current live site with this PR build (as a double check).

Hopefully you won't find many differences :-)

[mmcky]

@shlff also just to clarify - there is no need to recheck the whole site. Just wanted another set of eyes to:

1. do some random spot checks
2. look for some of the issues that have cropped up before

[shlff]

Thanks @mmcky , I randomly selected 3 lectures and here are the differences I spotted (maybe not issues; left: live website, right: preview of this PR):

[x] added signs:

[x] Bold font for subsubsections

[x] some problematic Latex output generated by code

[x] different color for quoted in-text code

[x] different style for quoted between-text code

[x] extra spaces above and below the code

[mmcky]

nice work @shlff -- really helpful. thank you.

[mmcky]

@AakashGfude any ideas on the LaTeX issue for output. Maybe I should change the priorities in the _config.yml to promote svg above LaTeX. Is mathjax not parsing the output blocks perhaps?

[mmcky]

@shlff I am unable to replicate that issue in about_py for the sympy math output. Can you let me know what browser you're using.

I have safari running

[shlff]

@shlff I am unable to replicate that issue in about_py for the sympy math output. Can you let me know what browser you're using.

I have safari running

Thanks @mmcky . I double-checked it again and didn't see the same issue either. Please ignore this issue.

[mmcky]

thanks again @shlff I think these difference in style are OK. It is really helpful to have these differences documented like this though.

I will go ahead and merge this to update the theme.

cc: @jstac