add comma in exercise list row

app/src/main/java/be/lepl1509group13/workoutwarrior/ListExercicesAdapter.java

@@ -51,10 +51,11 @@ public class ListExercicesAdapter extends ArrayAdapter<String> {
                 if (set.getKey().name == exercise) {
                     training_days = "";
                     for (String day : set.getValue()) {
-                        training_days += getShortDayName(day) + " ";
+                        training_days += getShortDayName(day) + ", ";
                     }
                 }
             }
+            training_days = training_days.substring(0, training_days.length() - 2);
 
             System.out.println("training days : " + training_days);
 

app/src/main/java/be/lepl1509group13/workoutwarrior/ProgramCreationActivity.java

@@ -342,8 +342,10 @@ public class ProgramCreationActivity extends AppCompatActivity {
         /**
          * Add the new exercise to the program
          */
-        if (exoInProgram(exercise)) messageExerciseAlreadyInProgram();
-        else {
+        if (exoInProgram(exercise)) {
+            Toast.makeText(this, "Exercice déjà dans le programme !",
+                    Toast.LENGTH_SHORT).show();
+        } else {
             program.put(exercise, trainingDays);
             exercisesListAdapter.add(exercise.name);
         }
@@ -358,11 +360,6 @@ public class ProgramCreationActivity extends AppCompatActivity {
         }
         return false;
     }
-    private void messageExerciseAlreadyInProgram() {
-        /**
-         * Display message "Exercise already in program"
-         */
-    }
 }
 
 class Exercise implements Serializable {