debian: override default value for SPHINXBUILD in docs/makefile
This is the recommended Debian approach.
As suggested by Debian Developer Stephen Kitt, use the approach
recommended by Debian for building Sphinx documentation. See
https://wiki.debian.org/Python/LibraryStyleGuide#Sphinx_documentation
Also belated credit to Zash on the #mercurial channel on the Freenode
IRC network, who suggested the Make variable approach in the first
place.
SPHINXBUILD ?= sphinx-build
all: tutorials/tutorial.rst tutorials/topic-tutorial.rst static/logo-evolve.ico
$(SPHINXBUILD) . ../html/
tutorials/tutorial.rst: tutorials/tutorial.t test2rst.py
python test2rst.py tutorials/
tutorials/topic-tutorial.rst: tutorials/topic-tutorial.t test2rst.py
python test2rst.py tutorials/
static/logo-evolve.ico: static/logo-evolve.svg
convert -resize 36x36 static/logo-evolve.svg static/logo-evolve.ico