Merge branch 'js/bisect-no-checkout'

* js/bisect-no-checkout: bisect: add support for bisecting bare repositories bisect: further style nitpicks bisect: replace "; then" with "\n<tab>*then" bisect: cleanup whitespace errors in git-bisect.sh. bisect: add documentation for --no-checkout option. bisect: add tests for the --no-checkout option. bisect: introduce --no-checkout support into porcelain. bisect: introduce support for --no-checkout option. bisect: add tests to document expected behaviour in presence of broken trees. bisect: use && to connect statements that are deferred with eval. bisect: move argument parsing before state modification.