This is continuation of #3, after some delay because I managed in the meantime to bring down a server from an Emacs buffer, and decided to flee home after that.
But 0pt is handled correctly by \texdimenwithunit if second argument is >1pt. The problem here is that the computer guy applied a math formula proven only for conversion ratio >1, not =1. In #3, there is a different problem applying when second argument is <1pt. There the output is technically correct (although not quite pleasing).
This is continuation of #3, after some delay because I managed in the meantime to bring down a server from an Emacs buffer, and decided to flee home after that.
But
0ptis handled correctly by\texdimenwithunitif second argument is>1pt. The problem here is that the computer guy applied a math formula proven only for conversion ratio>1, not=1. In #3, there is a different problem applying when second argument is<1pt. There the output is technically correct (although not quite pleasing).