minor improvements

src/main/java/at/ac/uibk/gitsearch/repository/search/MetaDataRepository.java

@@ -461,8 +461,8 @@ public class MetaDataRepository {
 				LOGGER.warn("Found {} hits for exercise id {}, expected only one!", searchResponse.getHits().totalHits,
 						exerciseId);
 			}
-			for (SearchHit searchHit : searchResponse.getHits().getHits()) {
-				return parseSearchHit(searchHit, objectMapper);
+			if( searchResponse.getHits().getHits().length > 0) {
+				return parseSearchHit(searchResponse.getHits().getHits()[0], objectMapper);
 			}
 		} catch (JsonProcessingException e) {
 			throw new NotFoundException(" Exercise with id " + exerciseId + " not found?", e);

src/main/webapp/app/exercise/markDownViewer/markDownViewer.component.html

@@ -3,7 +3,8 @@
         <div class="modal-dialog modal-lg modal-dialog-centered">
             <div class="modal-content">
                 <!-- Modal Header -->
-                <div class="modal-header">README
+                <div class="modal-header">{{filename}}
+                     <button type="button" class="close" data-dismiss="modal">&times;</button>
                 </div>
 
                 <!-- Modal body -->

src/main/webapp/app/exercise/markDownViewer/markDownViewer.component.ts

@@ -28,6 +28,7 @@ export class MarkDownViewerComponent implements OnInit, OnChanges {
     ngOnInit(): void {
     }
 
+    // eslint-disable-next-line
     ngOnChanges(changes: SimpleChanges): void {
         this.exerciseService.loadExerciseFile(this.exercise!.originalResult.project.project_id, 'README.md').subscribe(
             (content) => { this.content = content; this.filename = 'README.md' },