fix rubocop whitespace violations

[bastelfreak]

No description provided.

[codecov]

Codecov Report

Base: 89.98% // Head: 89.98% // No change to project coverage 👍

Coverage data is based on head (1d32f61) compared to base (e697968).
Patch coverage: 87.87% of modified lines in pull request are covered.

❗ Current head 1d32f61 differs from pull request most recent head 110ec69. Consider uploading reports for the commit 110ec69 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #489   +/-   ##
=======================================
  Coverage   89.98%   89.98%           
=======================================
  Files          76       76           
  Lines        1578     1578           
=======================================
  Hits         1420     1420           
  Misses        158      158           

Impacted Files	Coverage Δ
lib/json-schema/attributes/properties.rb	100.00% <ø> (ø)
lib/json-schema/util/uuid.rb	47.40% <50.00%> (ø)
lib/json-schema/validator.rb	85.06% <88.46%> (ø)
lib/json-schema.rb	81.81% <100.00%> (ø)
lib/json-schema/errors/validation_error.rb	100.00% <100.00%> (ø)
lib/json-schema/schema.rb	96.96% <100.00%> (ø)

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