Cleanup exercise scripts

* whitespace and comment cleanups only

Change-Id: Iab9c2d9a25c3473f14190d60f2f2cf5be0ed59dc
diff --git a/exercises/swift.sh b/exercises/swift.sh
index 732445d..4cd487b 100755
--- a/exercises/swift.sh
+++ b/exercises/swift.sh
@@ -40,6 +40,7 @@
 # exercise is skipped.
 is_service_enabled swift || exit 55
 
+
 # Testing Swift
 # =============