This change does a few things:
1. Uses .nf and .fi to disable fill during block
2. Shortens block lines likely to wrap
3. Moves instruction stack effect to subsection header
This change adds uxntal.7 [1].
It also updates the makefile to install the executables and man page
in ~/.local (~/.local/bin and ~/.local/share/man respectively). This
can easily be overridden by using PREFIX, for example:
# install into home directory
make PREFIX=$HOME install
# install into /usr/local
make PREFIX=/usr/local install
Finally, it updates the README to describe these things.
[1] Origin: https://git.phial.org/d6/nxu/raw/branch/main/uxntal.7