[Trivial fix]Remove unnecessary slash
[Trivial fix]Remove unnecessary slash

This is to remove the unncessary slash when the line doesn't
exceed the length of 79, just to keep the code clean.

Change-Id: I1a5c339a4c0d85beff94ac2b00afffda99cc869d

masayukig/tempest,cisco-openstack/tempest,masayukig/tempest,openstack/tempest,openstack/tempest,cisco-openstack/tempest