table_display.py example now uses tableformatter instead of tabulate

[tleonhardt]

Changed the table_display.py example to use the tableformatter module which resuls in nicer looking tables.

This closes #450

[codecov]

Codecov Report

Merging #456 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #456   +/-   ##
=======================================
  Coverage   90.18%   90.18%           
=======================================
  Files          10       10           
  Lines        2741     2741           
=======================================
  Hits         2472     2472           
  Misses        269      269

Impacted Files	Coverage Δ
cmd2/cmd2.py	90.43% <100%> (ø)	⬆️

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[tleonhardt]

@anselor Please feel free to make any changes you would recommend. I'm just trying to demonstrate the basics of how to make a nice looking table within cmd2.

[tleonhardt]

I pushed some unicode updates to make the unicode features very obvious. Unfortunately, my improvements appear to have unearthed a bug in the wcwidth module:
jquast/wcwidth#25

[anselor]

I can see why it would return 9 instead of 5. It's probably assuming each of those Hindi characters renders at 2 characters wide.

[tleonhardt]

The Hindi discrepancy appears to occur on macOS but not Linux

[tleonhardt]

I switched to get the Hindi translation of Mumbai based on Google Translate instead of a Google search which gave a different result and the width is working correctly now.

[tleonhardt]

@anselor I added the ability to choose the grid style based on argparse arguments to the commands.

I am now done with all of the changes I wanted to make to this. As long as you are happy with it, I think it is good to merge.

If we can figure out how to auto-color text in a row red if the population density is crazy high, then that would be gravy - but that can be done later, probably after we make some minor API changes in tableformatter.