Add variable to expand for format string

Also, add a space to separate words.

Otherwise, you can get a warning message similar to this:

2013-10-03 19:45:48.086 12123 WARNING 186_new_bdm_format [-] Got an unexpected block device %sthat cannot be converted to v2 format

Change-Id: I7f32e9d93d524a0763918d636f43bd7d2638b5de
Merge "Add variable to expand for format string"