minor changes

Author: stevedanomodolor

nav2_minimal_tb4_sim/launch/simulation.launch.py

@@ -110,7 +110,7 @@ def generate_launch_description():
     )
 
     declare_simulator_cmd = DeclareLaunchArgument(
-        'headless', default_value='False', description='Whether to execute gzclient)'
+        'headless', default_value='False', description='Whether to execute gzclient'
     )
 
     declare_world_cmd = DeclareLaunchArgument(
@@ -155,7 +155,7 @@ def generate_launch_description():
     )
 
     # The SDF file for the world is a xacro file because we wanted to
-    # conditionally load the SceneBroadcaster plugin based on wheter we're
+    # conditionally load the SceneBroadcaster plugin based on whether we're
     # running in headless mode. But currently, the Gazebo command line doesn't
     # take SDF strings for worlds, so the output of xacro needs to be saved into
     # a temporary file and passed to Gazebo.