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LuaRocks: luarocks install wcwidth

Changes from 0.2 to 0.3:

 * Updated Unicode tables to version 11. This covers the new codepoints
   added to the standard since 2016.

The lua-wcwidth module implements the wcwidth(3) function as specified by
the POSIX.1-2001 and POSIX.1-2008 specifications in pure Lua, without any

This function is mostly useful to determine how many “cells” a character
takes, in order to precisely write and position Unicode text content into
a terminal — or into any other output device using monospaced fonts.



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