Simplify arrayToString

This removes the <br> tags which were
previously inserted after every five elements.
Line breaks should be handled dynamically
by the browser.

src/main/webapp/app/exercise/exercise-details/exercise-metadata/exercise-metadata-list-item/exercise-metadata-list-item.component.ts

@@ -16,18 +16,10 @@ export class ExerciseMetadataListItemComponent implements OnInit {
 
   public arrayToString(array: string[]): string {
     let result = '';
-    let i = 1;
-    array.forEach(element => {
-      if (array.length > 1 && array.length !== i) {
-        result += element + ', ';
-      } else {
-        result += element;
-      }
-      if (i % 5 === 0) {
-        result += '<br>';
-      }
-      i++;
-    });
+    for (let i = 0; i < array.length - 1; ++i) {
+      result += array[i] + ', ';
+    }
+    result += array[array.length - 1];
     return result;
   }
 }