md5sum change when modifying comments in msg/srv/action?

edit

When only updating comments in .msg/.srv/.action file, does checksum get changed?

Locally I tested as follows and md5 doesn't seem to change.

Here's from DEB:

$ rospack find moveit_msgs
/opt/ros/indigo/share/moveit_msgs
$ rossrv md5 ExecuteKnownTrajectory
[moveit_msgs/ExecuteKnownTrajectory]: e30b86cbd13304832e894dc994795e33
$ rosversion moveit_msgs
0.7.4
$ dpkg -p ros-indigo-moveit-msgs|grep Ver
Version: 0.7.4-0trusty-20160822-230048-0700

Then I modified comment only in ExecuteKnownTrajectory.srv (using this PR):

$ cd src/ros-planning/moveit_msgs
$ git log
commit 2807deaf572d19793e825c39453fc7337d68e749
Author: Isaac I.Y. Saito <130s@2000.jukuin.keio.ac.jp>
Date:   Mon Aug 29 17:34:11 2016 -0700

    Add comment in ExecuteKnownTrajectory service to prioritize newly added ExecuteTrajectory action.
:
$ catkin build moveit_msgs
$ source install/setup.bash
$ rospack find moveit_msgs
/home/rosnoodle/indigo_trusty/cws_planning/install/share/moveit_msgs
$ rossrv md5 ExecuteKnownTrajectory
[moveit_msgs/ExecuteKnownTrajectory]: e30b86cbd13304832e894dc994795e33

md5sum seems to be the same.

IMO comment is the best place for description of those files so I hope the answer to be false.