od2line() throws an error if only one origin-destination relation is selected #578

	on:
	issue_comment:
	types: [created]
	name: Commands
	jobs:
	document:
	if: startsWith(github.event.comment.body, '/document')
	name: document
	runs-on: macOS-latest
	steps:
	- uses: actions/checkout@v1
	- uses: r-lib/actions/pr-fetch@master
	with:
	repo-token: ${{ secrets.GITHUB_TOKEN }}
	- uses: r-lib/actions/setup-r@master
	- name: "[Custom block] [macOS] Install spatial libraries"
	if: runner.os == 'macOS'
	run: \|
	# conflicts with gfortran from r-lib/actions when linking gcc
	rm '/usr/local/bin/gfortran'
	brew install pkg-config gdal proj geos
	- name: Install dependencies
	run: Rscript -e 'install.packages(c("remotes", "roxygen2"))' -e 'remotes::install_deps(dependencies = TRUE)'
	- name: Document
	run: Rscript -e 'roxygen2::roxygenise()'
	- name: commit
	run: \|
	git add man/\* NAMESPACE
	git commit -m 'Document'
	- uses: r-lib/actions/pr-push@master
	with:
	repo-token: ${{ secrets.GITHUB_TOKEN }}
	style:
	if: startsWith(github.event.comment.body, '/style')
	name: document
	runs-on: macOS-latest
	steps:
	- uses: actions/checkout@master
	- uses: r-lib/actions/pr-fetch@master
	with:
	repo-token: ${{ secrets.GITHUB_TOKEN }}
	- uses: r-lib/actions/setup-r@master
	- name: Install dependencies
	run: Rscript -e 'install.packages("styler")'
	- name: style
	run: Rscript -e 'styler::style_pkg()'
	- name: commit
	run: \|
	git add \*.R
	git commit -m 'style'
	- uses: r-lib/actions/pr-push@master
	with:
	repo-token: ${{ secrets.GITHUB_TOKEN }}
	# A mock job just to ensure we have a successful build status
	finish:
	runs-on: ubuntu-latest
	steps:
	- run: true

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