[[!comment format=mdwn
 username="joey"
 subject="""comment 1"""
 date="2018-05-23T17:07:27Z"
 content="""
I suspect this is a bug in the fastMigrate code.

Interestingly, the SHA256 key with an exctension works ok, eg fsck can
verify the checksum.

Also, a subsequent `git annex migrate --backend=SHA256E`
results in a SHA256E key with no extension.
"""]]
