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

@@ -52,12 +52,21 @@
     protected
 
     def write_scalar(value)
       @first = false
 
-        # 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 YieldingMappingWriter < YieldingWriter