Add missing LF at the end of GarbageCollectCommandTest

Change-Id: I70d0e59daf86f09989602455424712080e1b24c6

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/GarbageCollectCommandTest.java

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/GarbageCollectCommandTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/GarbageCollectCommandTest.java
index fb1424d..2954570 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/GarbageCollectCommandTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/GarbageCollectCommandTest.java
@@ -80,4 +80,4 @@ private static boolean hasLooseRef(Git git) throws IOException {
 				.filter(r -> !r.isSymbolic())
 				.anyMatch(r -> r.getStorage().isLoose());
 	}
-}
\ No newline at end of file
+}