test: also use 'devel.legacy.exchange=bundle1' in test
Changeset 39537bc64442 in mercurial removed the 'experimental.bundle2' option.
We use the new option in parallel.
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