ASCII art to Unicode converter

Hackage Link: [https://hackage.haskell.org/package/ascii-art-to-unicode](https://hackage.haskell.org/package/ascii-art-to-unicode)

Small CLI program to convert ASCII box drawings to unicode. Inspired by svgbob and The Monads Hidden Behind Every Zipper.

Usage:

aa2u > outfile  # Reads from stdin
aa2u < infile   # Prints to stdout
aa2u infile     # Input file as argument works as well
aa2u < infile > outfile  # Convert a file