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).
% initialize repository
adding a
% try hgweb request
0
1f424bb22ec05c3c6bc866b6e67efe43 page1