minor fixes, left over from #1026

[ocefpaf]

@benjwadams these changes addresses some of your comment in #1026.

[codecov]

Codecov Report

Merging #1028 (b902a7b) into develop (07a7874) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop    #1028   +/-   ##
========================================
  Coverage    82.20%   82.20%           
========================================
  Files           24       24           
  Lines         5177     5177           
  Branches      1293     1293           
========================================
  Hits          4256     4256           
  Misses         622      622           
  Partials       299      299           

Impacted Files	Coverage Δ
compliance_checker/cf/cf_1_7.py	93.72% <ø> (ø)
compliance_checker/cf/cf_1_9.py	81.33% <ø> (ø)
compliance_checker/ioos.py	83.11% <ø> (ø)
compliance_checker/acdd.py	80.71% <100.00%> (ø)
compliance_checker/cf/cf_1_6.py	89.85% <100.00%> (ø)
compliance_checker/cf/cf_base.py	82.77% <100.00%> (ø)

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[ocefpaf]

100% green CI 🎉