Fix a couple doc issues

[LegalizeAdulthood]

I couldn't fix the one about the visualizer, because I don't know where it lives currently.

Relates to #717

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.7%. Comparing base (f81c13b) to head (d31b9b0).
Report is 3 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop    #719   +/-   ##
=======================================
  Coverage     94.7%   94.7%           
=======================================
  Files          296     296           
  Lines        30881   30881           
=======================================
  Hits         29233   29233           
  Misses        1648    1648           

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[ckormanyos]

I couldn't fix the one about the visualizer, because I don't know where it lives currently.

I can't even find the sandbox. Maybe we should simply re-word this and consider it and describe it as a legacy topic. I do, however, think that this topic can be modernized. Maybe one day, really down the road, we can look into a visualizer.

There is a typo in the first sentence.

"Lets face it, debugger" ...

Should be

"Let's face it debugging" ...

[ckormanyos]

OK @LegalizeAdulthood I decided to finish this one to get #712 and #715 in there. I'll take a crack at the outdated page ASAP.