topics: wrap the update function to check if either t0 or b0 is passed as rev
t0 or b0, seriously, what's that. Do they even exist? Hold on and look for the
next commits what we are trying to do.
all: tutorials/tutorial.rst static/logo-evolve.ico
sphinx-build . ../html/
tutorials/tutorial.rst: tutorials/tutorial.t
python test2rst.py tutorials/
static/logo-evolve.ico: static/logo-evolve.svg
convert -resize 36x36 static/logo-evolve.svg static/logo-evolve.ico