leading empty lines and comments on root level literal scalars not preserved0.15.49

added test, fixed both now you can have

--- !some_tag |  # with a comment
this is a multi-
line literal scalar

1 files changed, 1 insertions, 1 deletions

diff --git a/scalarstring.py b/scalarstring.py
index 4b1a317..ef283d2 100644
--- a/scalarstring.py
+++ b/scalarstring.py
@@ -28,7 +28,7 @@ class ScalarString(text_type):
 
 
 class PreservedScalarString(ScalarString):
-    __slots__ = ()
+    __slots__ = ('comment')  # the comment after the | on the first line
 
     style = '|'