evolvecmd: fix broken `evolve --continue` ran after `next --evolve`
Recent series broke `evolve --continue`in cases when run after `hg next
--evolve`. The previous patch adds test demonstarting the broken behaviour, this
patch fixes that by storing the command which leads us to evolve --continue in
the evolvestate.
syntax: re
/figures/[^/]+\.png$
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
^tests/.*\.err$
^tests/easy_run.sh$
^build/
^dist/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$
tests/\.testtimes
^docs/training/graphs/
^docs/training/html/
^docs/training/index.html
^docs/training/graphviz-images/
^docs/training/img/
^docs/training/output/
^docs/training/pandocfilters/