Correcting width measurements by Terminal

[jquast]

I thought you might be interested in the article, Perfecting Terminal Character Width Using Correction Tables where I present a terminal-specific solution of width measurement, wcstwidth().

It would be a bit of work to integrate into this library but it is possible. It might look like:

• ensuring this project matches the python wcwidth specification,
• using ucs-detect as a sub-module and using code generation (like update-tables.py), create correction tables from its data/ folder,
  • alternatively, the python wcwidth code generation script can generate ruby code with a few small jinja2 template files, the python wcwidth project could be used as submodule instead of ucs-detect raw data to generate the code tables.
• and writing new code (like _wcswidth.py) to make use of the new correction tables in width calculation
• and documentation about terminal-aware measurements, replacing the caveats to point to this solution.

Long-term:

On any update to ucs-detect results:

1. update our git submodules of ucs-detect
2. generate new "correction tables" in our ruby or python projects
3. and conditionally make a release of our own.

Just a thought, no pressure, just wondering what you think