[BUG] Regression in 5.0.1 ruby faraday generator

Created by: cgfarmer4

Bug Report Checklist

Have you provided a full/minimal spec to reproduce the issue?
Have you validated the input using an OpenAPI validator (example)?
Have you tested with the latest master to confirm the issue still exists?
Have you searched for related issues/PRs?
What's the actual output vs expected output?
[Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

After upgrading to 5.0.1, I receive a syntax error in one of my models. This does not happen on 5.0.0. I tried deleting all my .mustache templates to see if it was related but it was not. None of them touch the models generation. We are modding:

api_client_faraday_partial.mustached api_client.mustache gemspec.mustache

plaid/models/asset_report_create_request.rb:114: syntax error, unexpected `end', expecting ')' (SyntaxError)
      end

openapi-generator version

docker cli 5.0.1

OpenAPI declaration file content or url

https://github.com/plaid/plaid-openapi/blob/master/2020-09-14.yml

Generation Details

docker run --rm -v $(CURRENT_DIR):/local openapitools/openapi-generator-cli:v5.0.0 generate -g ruby  \
-i local/$(OPENAPI_FILE) \
-o local/$(OUTPUT_FOLDER)/generated-ruby \
--global-property=apiTests=false,modelTests=false  \
--library=faraday \
-p gemName=plaid,gemRequiredRubyVersion=">= 2.7.1",gemVersion=$(RUBY_PACKAGE_VERSION) \
-t local/templates/ruby

Steps to reproduce

Run bundle install then bundle exec rake test and receive the error.