docs: fix some typos on javadocs

src/main/java/de/stklcode/pubtrans/ura/model/Message.java

@@ -187,7 +187,7 @@ public class Message implements Model {
     /**
      * Messages are assigned a priority in order for them to be ranked.
      * Since it is possible for a stop to be assigned multiple messages it is important to ensure priority is given.
-     * Priorities are between 1 and 10 (where 1 is the highest priority). By default the message priority is set to 3.
+     * Priorities are between 1 and 10 (where 1 is the highest priority). By default, the message priority is set to 3.
      *
      * @return Message priority.
      */

src/main/java/de/stklcode/pubtrans/ura/model/Stop.java

@@ -196,7 +196,7 @@ public final class Stop implements Model {
     }
 
     /**
-     * The longitude of the stop. This isexpressed using the WGS84 coordinate system.
+     * The longitude of the stop. This is expressed using the WGS84 coordinate system.
      *
      * @return The stop geolocation longitude.
      */