Move .PHONY to each section to avoid copy/paste omissions

Makefile

@@ -15,9 +15,7 @@ PAPEROPT_a4     = -D latex_paper_size=a4
 PAPEROPT_letter = -D latex_paper_size=letter
 ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
 
-.PHONY: help venv clean html dirhtml singlehtml pickle json htmlhelp qthelp \
-        devhelp epub latex latexpdf text man changes linkcheck doctest htmlview check
-
+.PHONY: help
 help:
 	@echo "Please use \`make <target>' where <target> is one of"
 	@echo "  venv       to create a venv with necessary tools"
@@ -41,12 +39,15 @@ help:
 	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
 	@echo "  check      to run a check for frequent markup errors"
 
+.PHONY: clean
 clean: clean-venv
 	-rm -rf $(BUILDDIR)/*
 
+.PHONY: clean-venv
 clean-venv:
 	rm -rf $(VENVDIR)
 
+.PHONY: venv
 venv:
 	@if [ -d $(VENVDIR) ] ; then \
 		echo "venv already exists."; \
@@ -55,6 +56,7 @@ venv:
 		$(MAKE) ensure-venv; \
 	fi
 
+.PHONY: ensure-venv
 ensure-venv:
 	@if [ ! -d $(VENVDIR) ] ; then \
 		$(PYTHON) -m venv $(VENVDIR); \
@@ -63,37 +65,44 @@ ensure-venv:
 		echo "The venv has been created in the $(VENVDIR) directory"; \
 	fi
 
+.PHONY: html
 html: ensure-venv
 	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
 	@echo
 	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
 
+.PHONY: dirhtml
 dirhtml: ensure-venv
 	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
 	@echo
 	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
 
+.PHONY: singlehtml
 singlehtml: ensure-venv
 	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
 	@echo
 	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
 
+.PHONY: pickle
 pickle: ensure-venv
 	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
 	@echo
 	@echo "Build finished; now you can process the pickle files."
 
+.PHONY: json
 json: ensure-venv
 	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
 	@echo
 	@echo "Build finished; now you can process the JSON files."
 
+.PHONY: htmlhelp
 htmlhelp: ensure-venv
 	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
 	@echo
 	@echo "Build finished; now you can run HTML Help Workshop with the" \
 	      ".hhp project file in $(BUILDDIR)/htmlhelp."
 
+.PHONY: qthelp
 qthelp: ensure-venv
 	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
 	@echo
@@ -103,6 +112,7 @@ qthelp: ensure-venv
 	@echo "To view the help file:"
 	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/PythonDevelopersGuide.qhc"
 
+.PHONY: devhelp
 devhelp: ensure-venv
 	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
 	@echo
@@ -112,34 +122,40 @@ devhelp: ensure-venv
 	@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/PythonDevelopersGuide"
 	@echo "# devhelp"
 
+.PHONY: epub
 epub: ensure-venv
 	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
 	@echo
 	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
 
+.PHONY: latex
 latex: ensure-venv
 	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
 	@echo
 	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
 	@echo "Run \`make' in that directory to run these through (pdf)latex" \
 	      "(use \`make latexpdf' here to do that automatically)."
 
+.PHONY: latexpdf
 latexpdf: ensure-venv
 	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
 	@echo "Running LaTeX files through pdflatex..."
 	make -C $(BUILDDIR)/latex all-pdf
 	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
 
+.PHONY: text
 text: ensure-venv
 	$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
 	@echo
 	@echo "Build finished. The text files are in $(BUILDDIR)/text."
 
+.PHONY: man
 man: ensure-venv
 	$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
 	@echo
 	@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
 
+.PHONY: changes
 changes: ensure-venv
 	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
 	@echo
@@ -151,18 +167,22 @@ linkcheck: ensure-venv
 	@echo "Link check complete; look for any errors in the above output " \
 	      "or in $(BUILDDIR)/linkcheck/output.txt."
 
+.PHONY: doctest
 doctest: ensure-venv
 	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
 	@echo "Testing of doctests in the sources finished, look at the " \
 	      "results in $(BUILDDIR)/doctest/output.txt."
 
+.PHONY: htmlview
 htmlview: html
 	$(PYTHON) -c "import os, webbrowser; webbrowser.open('file://' + os.path.realpath('_build/html/index.html'))"
 
+.PHONY: check
 check: ensure-venv
 	# Ignore the tools and venv dirs and check that the default role is not used.
 	$(SPHINXLINT) -i tools -i $(VENVDIR) --enable default-role
 
+.PHONY: serve
 serve:
 	@echo "The 'serve' target was removed, use 'htmlview' instead" \
 	      "(see https://github.com/python/cpython/issues/80510)"