FileRepository: Open FileInputStream in try-with-resource

Change-Id: Ief8aa4834437d76f7e636598bf9861312475e64a
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileRepository.java

@@ -620,11 +620,8 @@ public class FileRepository extends Repository {
 		static void loadRulesFromFile(AttributesNode r, File attrs)
 				throws FileNotFoundException, IOException {
 			if (attrs.exists()) {
-				FileInputStream in = new FileInputStream(attrs);
-				try {
+				try (FileInputStream in = new FileInputStream(attrs)) {
 					r.parse(in);
-				} finally {
-					in.close();
 				}
 			}
 		}