Fix exclusions so we don't run style check for every appraisal config

Author: Jack Casey

.travis.yml

@@ -16,15 +16,15 @@ env:
   - COMMAND=rspec APPRAISAL_INITIALIZED=true
 matrix:
   exclude:
-    - env: COMMAND=standardrb --no-fix --format progress
+    - env: COMMAND="standardrb --no-fix --format progress"
       gemfile: gemfiles/rails_4.gemfile
-    - env: COMMAND=standardrb --no-fix --format progress
+    - env: COMMAND="standardrb --no-fix --format progress"
       gemfile: gemfiles/rails_5.gemfile
-    - env: COMMAND=standardrb --no-fix --format progress
+    - env: COMMAND="standardrb --no-fix --format progress"
       gemfile: gemfiles/rails_6.gemfile
-    - env: COMMAND=standardrb --no-fix --format progress
+    - env: COMMAND="standardrb --no-fix --format progress"
       gemfile: gemfiles/rails_5_graphiti_rails.gemfile
-    - env: COMMAND=standardrb --no-fix --format progress
+    - env: COMMAND="standardrb --no-fix --format progress"
       gemfile: gemfiles/rails_6_graphiti_rails.gemfile
     - env: COMMAND=rspec APPRAISAL_INITIALIZED=true
       gemfile: Gemfile