#188 lmerge does not preserve comments

[Sean Sweda]

truelies-radmind:; cat hwreg-generic.T
## HERE IS A COMMENT ##
d ./etc/sysconfig/hwreg 0755 0 0
l ./etc/sysconfig/hwreg/mboard ../hwreg_modules/mboard_mac

truelies-radmind:; lmerge -f /dev/null hwreg-generic.T

truelies-radmind:; cat hwreg-generic.T
d ./etc/sysconfig/hwreg 0755 0 0
l ./etc/sysconfig/hwreg/mboard ../hwreg_modules/mboard_mac

truelies-radmind:; fsdiff -V
1.11.1

I believe the behavior is the same in 1.13.0rc2