Apply suggestions from code review

Co-authored-by: Martin Pecka <peci1@seznam.cz>

Author: michalpelka

srv/BatchSpawnEntities.srv

@@ -10,22 +10,22 @@ string names[]                          # A list of names given to every entity
                                         # error is returned. 
 bool allow_renaming[]                   # Determines whether the spawning succeeds with a non-unique name.
                                         # If it is set to true, the user should always check entity_name response field
-                                        # and use it for any further interactions. Number of elements have to match Number
+                                        # and use it for any further interactions. Number of elements has to match number
                                         # of elements in names.
 
 Resource entity_resources[]             # List of resources such as SDFormat, URDF, USD or MJCF file, a native prefab, etc.
                                         # Valid URIs can be determined by calling GetSpawnables first. 
                                         # Check simulator format support via the spawn_formats field in GetSimulatorFeatures.
                                         # Using resource_string is supported if GetSimulatorFeatures includes
-                                        # the SPAWNING_RESOURCE_STRING feature. Number of elements have to match Number
+                                        # the SPAWNING_RESOURCE_STRING feature. Number of elements has to match number
                                         # of elements in names.
 
-string entity_namespaces[]              # Spawn entities with theirs interfaces under those namespaces. Number of elements have to match Number
+string entity_namespaces[]              # Spawn entities with theirs interfaces under those namespaces. Number of elements has to match number
                                         # of elements in names.
 geometry_msgs/PoseStamped initial_poses[] # Array of initial poses for every enttiy.
                                         # The header contains a reference frame, which defaults to global "world" frame.
                                         # This frame must be known to the simulator, e.g. of an object spawned earlier.
-                                        # The timestamp field in the header is ignored. Number of elements have to match Number
+                                        # The timestamp field in the header is ignored. Number of elements has to match number
                                         # of elements in names.
 
 ---
@@ -36,7 +36,9 @@ uint8 BATCH_SPAWN_MISMATCH  = 110       # There is a mismatch in number of eleme
                                         # entity_namespaces, initial_poses.
 uint8 BATCH_SPAWN_FAILED    = 120       # There was at least one failed spawn request. Check individual results in results.
 
-Result result                           # If all spawning request succeeded it will give RESULT_OK or BATCH_SPAWN_FAILED
-Result results[]                        # Individual spawn request results. Supported return codes are in SpanwEntity.srv.
+Result result                           # RESULT_OK if all spawning requests succeeded, otherwise BATCH_SPAWN_FAILED
+Result results[]                        # Individual spawn request results. Supported return codes are in SpawnEntity.srv.
+                                        # Number of elements is the same as the number of names in request.
 string entity_names[]                   # List of names of spawned entities, guaranteed to be unique in the simulation.
                                         # If allow_renaming is true, it may differ from the request name field.
+                                        # Number of elements is the same as the number of names in request.