SOLVED: See the two lines (from the log above):
--no-restore --quiet CMD INSTALL "C:/Users/Bruce
Nelson/AppData/Local/Temp/RtmpgxuJWG/devtools145011af6c80/kjhealy-socviz-60c2cc5"
This suggested to me that the problem was the space in my user name (Bruce Nelson), a conclusion reinforced by the later two lines that say the portion of the pathname starting with ' Nelson' was ignored:
** testing if installed package can be loaded
ARGUMENT 'Nelson\AppData\Local\Temp\RtmpM7rzPd\Rin245c51a07cc0' ignored
So I enter Windwows as another user with a single name (no space in the path) and installed all required packages (my_packages) and then ran the command:
devtools::install_github("kjhealy/socviz")
Here is the log of the successful install of socviz, using Microsoft R-open 3.5.1:
- installing source package 'socviz' ...
** R
** data
*** moving datasets to lazyload DB
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
*** copying figures
** building package indices
** testing if installed package can be loaded
- DONE (socviz)
In R CMD INSTALL