Don't error on piped data #184

	name: CI
	on: [push, pull_request]
	jobs:
	build:
	if: github.event_name == 'push' \|\| github.event.pull_request.head.repo.full_name != github.repository
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [macos-latest, windows-latest, ubuntu-latest]
	python-version: [3.8, 3.9, '3.10', '3.11', '3.12', pypy-3.9]
	steps:
	- if: matrix.os == 'ubuntu-latest'
	name: Install UTF-8 locales and lxml requirements
	run: \|
	sudo apt install libxml2-dev libxslt-dev
	sudo locale-gen de_DE.UTF-8
	sudo locale-gen en_US.UTF-8
	sudo locale-gen ko_KR.UTF-8
	sudo update-locale
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: pip
	cache-dependency-path: setup.py
	- run: pip install .[test] coveralls
	- if: matrix.python-version == '3.8'
	run: pip install 'lxml<5'
	- env:
	LANG: en_US.UTF-8
	PYTHONIOENCODING: utf-8
	PYTHONUTF8: 1
	run: pytest --cov agate
	- name: Read from stdin
	run: python -c 'import sys; import agate; agate.Table.from_csv(sys.stdin, sniff_limit=1)' < examples/test.csv
	- name: Read from pipe
	run: printf 'a,b,c\n1,2,3' \| python -c 'import sys; import agate; agate.Table.from_csv(sys.stdin, sniff_limit=1)'
	- run: python charts.py
	- env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: coveralls --service=github

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