[MERGE] left align log output if it only contains merge revisions

[Ian Clatworthy]

Ian Clatworthy has voted +1.
Status is now: Conditionally approved
Comment:
I agree with Kent that this is an incremental improvement to the UI. 
Martin has indicated that he's ok with this in principle assuming the 
code is ok. The code is fine by me and previously got a +1 from John. 
I'll merge it tomorrow.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C468F1127.7020901%40gmail.com%3E