rubocop-naming.yml in gitlab-styles-11.0.0 vs rubocop-naming.yml in gitlab-styles-13.0.0

@@ -48,10 +48,11 @@
 # NamePrefix: is_, has_, have_
 # NamePrefixBlacklist: is_, has_, have_
 # NameWhitelist: is_a?
 Naming/PredicateName:
   Enabled: true
-  ForbiddenPrefixes: is_
+  ForbiddenPrefixes:
+    - is_
   Exclude:
     - 'spec/**/*'
     - 'features/**/*'
 
 # Use the configured style when naming variables.