dirstate-item: make sure we set the mtime-second-ambiguous on v2 write...
dirstate-item: make sure we set the mtime-second-ambiguous on v2 write
We want to preserve the second-ambiguity alongside the ambiguous mtime. So we
use the decimated flag for that.
note: the C code was already doing so. No change was needed to it.
Differential Revision:
https://phab.mercurial-scm.org/D11845
