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docs: Call 'python -m sphinx' instead of sphinx-build
Fixes mismatches where default Python interpreter may not match the most recently installed sphinx-build wrapper script (if sphinx 2 & 3 both installed, pip will clobber any previous copy of /bin/sphinx-build when it installs the new one.)
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@ -15,15 +15,12 @@
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# You can set these variables from the command line.
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SPHINXOPTS =
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SPHINXBUILD = sphinx-build
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# note: this is changed from sphinx-build so it depends on default python interpreter, not on /bin/sphinx-build
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# (which will be the most recently installed version of sphinx and may not match)
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SPHINXBUILD = python2 -m sphinx
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PAPER =
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BUILDDIR = _build
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# User-friendly check for sphinx-build
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ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
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$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don\'t have Sphinx installed, grab it from http://sphinx-doc.org/)
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endif
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# Internal variables.
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PAPEROPT_a4 = -D latex_paper_size=a4
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PAPEROPT_letter = -D latex_paper_size=letter
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