Getting a failure in the tests:

[schneems]

2.93s$ gem update --system
Updating rubygems-update
Fetching: rubygems-update-3.0.2.gem (100%)
ERROR:  Error installing rubygems-update:
	rubygems-update requires Ruby version >= 2.3.0.
ERROR:  While executing gem ... (NoMethodError)
    undefined method `version' for nil:NilClass
The command "gem update --system" failed and exited with 1 during .

[MSP-Greg]

See PR #1682. I didn't catch the white-space, I can force a merge. Travis ruby-head is kind of broken as to RubyGems. Hopefully it will be fixed soon...

Uses:

before_install:
  # rubygems 2.7.8 and greater include bundler
  - |
    rv="$(ruby -e 'STDOUT.write RUBY_VERSION')";
    if   [ "$rv" \< "2.3" ]; then gem update --system 2.7.8 --no-document
    elif [ "$rv" \< "2.6" ]; then gem update --system --no-document --conservative
    fi
  - ruby -v && gem --version && bundle version

JFYI, Appveyor is building with 2.6. Didn't add it to Travis, as I suspect it will fail like ruby-head...

[schneems]

Thanks for your PR I totally missed it. You're pretty fast on the gun. Need this for #1700