Update student_t_copula.stanfunctions #213

	name: Formatting

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

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- uses: r-lib/actions/pr-fetch@v2-branch
	if: github.ref != 'refs/heads/main'
	with:
	repo-token: ${{ secrets.GITHUB_TOKEN }}

	- name: Download stanc3
	run: \|
	cd ..
	wget https://github.com/stan-dev/stanc3/releases/download/nightly/linux-stanc
	chmod +x linux-stanc
	cd helpful_stan_functions

	- name: Auto-format
	run: \|
	for F in `find . -type f -name "*.stanfunctions"`
	do
	if [ $(grep "derivative_fun" $F \| wc -l) -eq "0" ]; then
	../linux-stanc --auto-format --max-line-length 90 $F --o $F --include-paths=./functions
	fi
	done

	- name: Git
	run: \|
	git config --global user.email "[email protected]"
	git config --global user.name "GitHub Actions"
	git add \*.stanfunctions
	git commit -m 'Formatting' \|\| echo "No changes to commit"

	- name: Push to main
	if: github.ref == 'refs/heads/main'
	run: \|
	git push

	- uses: r-lib/actions/pr-push@v2-branch
	if: github.ref != 'refs/heads/main'
	with:
	repo-token: ${{ secrets.GITHUB_TOKEN }}

Provide feedback