test: adapt to new hidden-changeset message
From c1aede895072 we have a nicer error message when accessing public
changesets:
abort: hidden revision '6'!
(use --hidden to access hidden revisions)
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