Fix indentation in generated YAML

Author: bquorning

lib/rubocop/rspec/config_formatter.rb

@@ -15,7 +15,9 @@ def initialize(config, descriptions)
       end
 
       def dump
-        YAML.dump(unified_config).gsub(EXTENSION_ROOT_DEPARTMENT, "\n\\1")
+        YAML.dump(unified_config)
+          .gsub(EXTENSION_ROOT_DEPARTMENT, "\n\\1")
+          .gsub(/^(\s+)- /, '\1  - ')
       end
 
       private