WiredTiger's tools directory has been reorganized and the wtstats tool now lives in a separate sub-directory ./tools/wtstats/
This needs to be reflected in the update-vendor-wiredtiger script.
Currently, the script no longer excludes the ./template source dir and commits the entire dir to the mongo repo, which is not necessary. All that is required is wtstats.py, stat_data.py and wtstats.html.template, both located in ./tools/wtstats/.
This line should instead exclude */tools/wtstats/template instead.