Martin von Zweigbergk <martinvonz@google.com> [Fri, 18 Oct 2019 15:16:57 -0700] rev 43296
largefiles: use context manager for setting "lfstatus" on subrepos too
It's safe since we now reset to the previous value.
Differential Revision: https://phab.mercurial-scm.org/D7138