IOS-XR accepts all ! comands and they stay in the configuration !
If execute the command
! Hi all
l2vpn
The comments stays there and it is associated with the next command you execute.
Now, how can we remove it!
Just do it with the "clear comment" command.
Example:
router static
vrf MYVRF
address-family ipv4 unicast
! This is server A route
10.1.1.1/32 2.2.2.2
commit
router static
vrf MYVRF
address-family ipv4 unicast
clear comment
10.1.1.1/32 2.2.2.2
commit