tests/test-rebuildstate.out

store: don't create dirs ending in period or space for hashed paths (issue1417)

Windows won't create directories with names ending in period or space, so
we replace the last period/space character in truncated directory names of
hashed paths with some other character (underbar).

adding bar
adding foo
% state dump after
n 666         -1 bar
n 666         -1 foo
% status
! bar
? baz
C foo