Fix #8: Use dollar with parentheses for command subsitutions since fi… #58

	name: Deploy
	on:
	push:
	branches:
	- master

	jobs:
	deploy:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: Install mdbook
	run: \|
	cargo install mdbook --no-default-features --features search --vers "^0.4" --locked
	- name: Deploy GitHub Pages
	run: \|
	# This assumes your book is in the root of your repository.
	# Just add a `cd` here if you need to change to another directory.
	mdbook build
	git worktree add gh-pages gh-pages
	git config user.name "Deploy from CI"
	git config user.email ""
	cd gh-pages
	# Delete the ref to avoid keeping history.
	git update-ref -d refs/heads/gh-pages
	rm -rf *
	mv ../book/* .
	git add .
	git commit -m "Deploy $GITHUB_SHA to gh-pages"
	git push --force

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