fix(docs): Align wording across files (#465)

Signed-off-by: Maximilian Rosin <maximilian.rosin@parson-europe.com>

Author: max-rosin

osi_lane.proto

@@ -56,7 +56,7 @@ message Lane
     // from one or more objects or external references.
     //
     // For example, to reference a lane defined in an OpenDRIVE map
-    // the items should be set as following:
+    // the items should be set as follows:
     // * reference = URI to map, can remain empty if identical with definiton
     //               in \c GroundTruth::map_reference
     // * type = "net.asam.opendrive"

osi_object.proto

@@ -45,16 +45,18 @@ message StationaryObject
     // The external reference points to the source of a stationary object, if it
     // is derived from an external sources like OpenDRIVE or OpenSCENARIO.
     //
-    // For OpenDRIVE, references to objects should be set as following:
+    // For example, to reference an object defined in an OpenDRIVE map
+    // the items should be set as follows:
     // * reference = URI to map, can remain empty if identical with definiton
     //               in \c GroundTruth::map_reference
     // * type = "net.asam.opendrive"
     // * identifier[0] = "object" for t_road_objects_object and
     //                   "bridge" for t_road_objects_bridge
     // * identifier[1] = id of t_road_objects_object or t_road_objects_bridge
     //
-    // For OpenSCENARIO, references to entities of the type MiscObject, which
-    // describes partly stationary objects, should be set as following:
+    // For example, to reference OpenSCENARIO entities of the type MiscObject,
+    // which describe partly stationary objects, the items should be set as 
+    // follows:
     // * reference = URI to the OpenSCENARIO File
     // * type = "net.asam.openscenario"
     // * identifier[0] = Entity-Type ("MiscObject")
@@ -397,8 +399,9 @@ message MovingObject
     // The external reference points to the source of an moving object, if it
     // is derived from an external sources like OpenSCENARIO.
     //
-    // For OpenSCENARIO, references to entities of the type Vehicle or
-    // Pedestrian, which describe moving objects, should be set as following:
+    // For example, to reference OpenSCENARIO entities of the type Vehicle or
+    // Pedestrian, which describe moving objects, the items should be set as
+    // follows:
     // * reference = URI to the OpenSCENARIO File
     // * type = "net.asam.openscenario"
     // * identifier[0] = Entity-Type ("Vehicle" or "Pedestrian")

osi_roadmarking.proto

@@ -61,7 +61,8 @@ message RoadMarking
     // is derived from one or more objects or external references. An example
     // here is the reference to the signal defined in a OpenDRIVE map.
     //
-    // For OpenDRIVE the items should be set as following:
+    // For example, to reference a signal defined in an OpenDRIVE map
+    // the items should be set as follows:
     // * reference = URI to map, can remain empty if identical with definiton
     //               in \c GroundTruth::map_reference
     // * type = "net.asam.opendrive"

osi_trafficlight.proto

@@ -48,7 +48,7 @@ message TrafficLight
     // is derived from one or more objects or external references.
     //
     // For example, to reference a signal defined in an OpenDRIVE map
-    // the items should be set as following:
+    // the items should be set as follows:
     // * reference = URI to map, can remain empty if identical with definition
     //               in \c GroundTruth::map_reference
     // * type = "net.asam.opendrive"

osi_trafficsign.proto

@@ -163,7 +163,7 @@ message TrafficSign
     // derived from one or more objects or external references.
     //
     // For example, to reference a signal defined in an OpenDRIVE map
-    // the items should be set as following:
+    // the items should be set as follows:
     // * reference = URI to map, can remain empty if identical with definition
     //               in \c GroundTruth::map_reference
     // * type = "net.asam.opendrive"