Generating GHC's Unicode table
==============================

WCsubst.c is generated with:

    version=13.0.0
    url=https://www.unicode.org/Public/$version/ucd/UnicodeData.txt
    curl -L $url > UnicodeData.txt
    sh ubconfc 12.0.0 < UnicodeData.txt > WCsubst.c

Don't forget to mention the update in the User's Guide.