continue: ensure we hold the wlock before writing file to disk
A hack in 'hg evolve --continue' involve writing a 'graftstate' file. We take
the wlock before doing so.
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