Output document end marker after open ended scalars (#162)

src/emitter.c

@@ -652,6 +652,18 @@
     else if (event->type == YAML_STREAM_END_EVENT)
     {
 
+        /**
+         * This can happen if a block scalar with trailing empty lines
+         * is at the end of the stream
+         */
+        if (emitter->open_ended)
+        {
+            if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0))
+                return 0;
+            emitter->open_ended = 0;
+            if (!yaml_emitter_write_indent(emitter))
+                return 0;
+        }
         if (!yaml_emitter_flush(emitter))
             return 0;