largefiles: missing largefiles should not be committed as removed
Largefiles can easily become missing - for example if it simply isn't available
or the download fail. It might even be convenient to be able to work that way
in some cases.
But commiting missing largefiles as if they had been 'hg remove'd is plain wrong.
running: init test1
result: None
running: add foo
result: 0
running: commit -m commit1 -d 2000-01-01 foo
result: None
running: commit -m commit2 -d 2000-01-02 foo
result: None
running: log -r 0
changeset: 0:0e4634943879
user: test
date: Sat Jan 01 00:00:00 2000 +0000
summary: commit1
result: None
running: log -r tip
changeset: 1:45589e459b2e
tag: tip
user: test
date: Sun Jan 02 00:00:00 2000 +0000
summary: commit2
result: None