check-code: Only call check-code if __name__ = "__main__".
This changeset moves the code that actually executes something to the
"if __name__ = '__main__'" section to allow the file to be imported as
a module.
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
removing b
created new head
% should abort
abort: crosses branches (use 'hg merge' to merge or use 'hg update -C' to discard changes)
% should succeed
1 files updated, 0 files merged, 0 files removed, 0 files unresolved