mtn: 2 heads on branch 'testbranch'
mtn: merge 1 / 1:
mtn: calculating best pair of heads to merge next
mtn: [left]  52f8049a6454895521a6a5f7d739ebfd58e72655
mtn: [right] 7d425fa3827653bfc4ea9b62560ef896bb3c83ca
mtn: misuse: right revision id does not match conflict file
