fixed minor typos (in comments)

src/main/java/it/unibz/inf/isochrone/algorithm/Isochrone.java

@@ -117,7 +117,7 @@ public abstract class Isochrone {
 	 * @param output the output in which the computed nodes and links are stored.
 	 * @return the computed output (stored in the output given by the parameter)
 	 */
-	// TODO: Add some more tests for this method. If isochrone gets too small (2points for 15min isochrone from FUB) nothing fails ;-( 
+	// TODO: Add some more tests for this method. If isochrone gets too small (2points for 15min isochrone from FUB) nothing fails ;-(
 	public <T extends Output> T compute(final T output) {
 		output.beforeCalculation();
 
@@ -282,7 +282,7 @@ public abstract class Isochrone {
 
 	/**
 	 * Remove a node from the in-memory network, only used in the
-	 * minex and mrnex algorithms.
+	 * MineX and MrneX algorithms.
 	 *
 	 * @param id The id of the node to be removed
 	 */