Handle duplicates in subjects and materials consistently #778

	name: goclean

	on:
	push:
	paths:
	- '**.go'
	- 'go.mod'
	- 'go.sum'
	branches:
	- main
	- release-*
	pull_request:
	paths:
	- '**.go'
	- 'go.mod'
	- 'go.sum'
	branches:
	- main
	- release-*
	schedule:
	- cron: '41 20 * * 1'

	jobs:
	goclean:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3 # check-out repository

	- name: Setup Go
	uses: actions/setup-go@v3
	with:
	go-version: '1.20.0'

	- name: go vet
	run: \|
	# Use in-place vendored dependencies.
	go vet -mod=vendor ./...

	# If this workflow fails, run `go fmt` on your tree and resubmit.
	# We ignore vendor/ files whose format we don't control.
	- name: go fmt
	run: if [ "$(gofmt -l . \| grep -v vendor/ \| grep -v third_party/ \| wc -l)" -gt 0 ]; then exit 1; fi

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