fixup! Let RSpec/SpecFilePathFormat leverage ActiveSupport inflections when defined and configured

Author: bquorning

spec/rubocop/cop/rspec/spec_file_path_format_spec.rb

@@ -311,7 +311,8 @@ def reset_activesupport_cache!
 
         allow(described_class::ActiveSupportInflector).to receive(:require)
           .with('active_support/inflector')
-        stub_const('ActiveSupport::Inflector', Module.new)
+        stub_const('ActiveSupport::Inflector',
+                   Module.new { def self.underscore(_); end })
 
         allow(described_class::ActiveSupportInflector).to receive(:require)
           .with('./config/initializers/inflections.rb')
@@ -395,7 +396,8 @@ def reset_activesupport_cache!
 
         allow(described_class::ActiveSupportInflector).to receive(:require)
           .with('active_support/inflector')
-        stub_const('ActiveSupport::Inflector', Module.new)
+        stub_const('ActiveSupport::Inflector',
+                   Module.new { def self.underscore(_); end })
 
         allow(described_class::ActiveSupportInflector).to receive(:require)
           .with(cop_config['InflectorPath'])