correct lint error

Author: hmoyen

gazebo/dave_gz_multibeam_sonar/multibeam_sonar/CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.11.0 FATAL_ERROR)
 # Suppress developer warnings for the entire workspace.
 set(CMAKE_SUPPRESS_DEVELOPER_WARNINGS TRUE CACHE BOOL
     "Suppress developer warnings" FORCE)
-# Set CMP0144 to NEW to ensure find_package 
+# Set CMP0144 to NEW to ensure find_package
 # uses upper-case <PACKAGENAME>_ROOT variables.
 cmake_policy(SET CMP0144 NEW)