fix incorrect parsing of negative hex/oct/bin #97

	# This workflow uses actions that are not certified by GitHub.
	# They are provided by a third-party and are governed by
	# separate terms of service, privacy policy, and support
	# documentation.
	# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
	# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby

	name: Ruby

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	test:
	strategy:
	matrix:
	ruby: [2.5, 2.6, 2.7, 3.0, 3.1, 3.2, 3.3, head]

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	with:
	submodules: true
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	bundler-cache: true # install and cache dependencies
	- name: Build parser
	run: bundle exec racc lib/kdl/kdl.yy
	- name: Run tests
	run: bundle exec rake test

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