lib/yaml-write-stream/stateful.rb in yaml-write-stream-1.0.2 vs lib/yaml-write-stream/stateful.rb in yaml-write-stream-1.0.3

@@ -113,12 +113,21 @@
     def current
       stack.last
     end
 
     def write_scalar(value)
-        # value, anchor, tag, plain, quoted, style
+      style = if value == ''
+        Psych::Nodes::Scalar::DOUBLE_QUOTED
+      else
+        Psych::Nodes::Scalar::ANY
+      end
+
+      quoted = value == ''
+      value = value ? value : ''
+
+      # value, anchor, tag, plain, quoted, style
       emitter.scalar(
-        value, nil, nil, true, false, Psych::Nodes::Scalar::ANY
+        value, nil, nil, true, quoted, style
       )
     end
   end
 
   class StatefulMappingWriter < StatefulWriter