Here is one of the most comprehensive post about the subject.
https://get-powershellblog.blogspot.com/2017/07/bye-bye-backtick-natural-line.html
But if you want to exchange more about this specific subject, the best way is to do as Leos suggested and open a forum topic.Luc Fullenwarth commented on
Display and search all variables of a PowerShell script with Get-Variable 3 years, 5 months ago
You are right: there are 8 occurrences of cpmv, and 10 of cmpv.
Indeed, this seems to be a typo error.