Refactor `get_xml_string` function to handle non-existent paths #7

	name: Read the Docs
	on:
	pull_request_target:
	types:
	- opened
	# Execute this action only on PRs that touch
	# documentation files.
	# paths:
	# - "docs/**"

	permissions:
	pull-requests: write

	jobs:
	documentation-links:
	runs-on: ubuntu-latest
	steps:
	- uses: readthedocs/actions/preview@v1
	with:
	project-slug: "adam-docs"

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