[Docs] Clarify the behvior of first, last, and nth on empty generators #421

	name: Building man page, man.test, manonig.test
	on:
	push:
	paths:
	- '.github/workflows/manpage.yml'
	- 'docs/**'
	- 'tests/man.test'
	- 'tests/manonig.test'
	- 'jq.1.prebuilt'
	pull_request:
	paths:
	- '.github/workflows/manpage.yml'
	- 'docs/**'
	- 'tests/man.test'
	- 'tests/manonig.test'
	- 'jq.1.prebuilt'

	jobs:
	manpages:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.11'
	cache: pipenv
	- name: Install pipenv
	run: pip install pipenv
	- name: Install dependencies
	run: pipenv sync
	working-directory: docs
	- name: Validate manual schema
	run: pipenv run python3 validate_manual_schema.py content/manual/*/.yml
	working-directory: docs
	- name: Configure
	run: \|
	autoreconf -i
	./configure --enable-docs
	- name: Build man page, man.test, manonig.test
	run: \|
	mv jq.1.prebuilt jq.1.old
	rm -f tests/man.test manonig.test
	make jq.1.prebuilt tests/man.test tests/manonig.test
	- name: Make sure that jq.1.prebuilt, man.test, manonig.test are up to date
	run: \|
	git diff --exit-code tests/man.test tests/manonig.test
	# skip build date in jq.1.prebuilt
	test -s jq.1.prebuilt
	diff -- <(tail -n +3 jq.1.old) <(tail -n +3 jq.1.prebuilt)

Provide feedback