all: minor fixes, notes

2 jobs for enbo_dev in 35 seconds (queued for 1 second)
Name Stage Failure
version-check Build
Skipping Git submodules setup
Executing "step_script" stage of the job script
$ mkdir -p .repo
$ CHART=$(git diff-tree --name-only --no-commit-id HEAD origin/master) # collapsed multi-line command
fatal: ambiguous argument 'origin/master': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
Cleaning up file based variables
ERROR: Job failed: exit code 1