diff --git a/Lib/unittest.py b/Lib/unittest.py
index aaed6a2..dde27fb 100644
--- a/Lib/unittest.py
+++ b/Lib/unittest.py
@@ -809,7 +809,8 @@
         return getattr(self.stream,attr)
 
     def writeln(self, arg=None):
-        if arg: self.write(arg)
+        if arg:
+            self.write(arg)
         self.write('\n') # text-mode streams translate to \r\n if needed