Fix for round_trip_load() YAML error, refs #2219

docs/metadata_doc.py

@@ -1,7 +1,7 @@
 import json
 import textwrap
 from yaml import safe_dump
-from ruamel.yaml import round_trip_load
+from ruamel.yaml import YAML
 
 
 def metadata_example(cog, data=None, yaml=None):
@@ -11,8 +11,7 @@ def metadata_example(cog, data=None, yaml=None):
     if yaml:
         # dedent it first
         yaml = textwrap.dedent(yaml).strip()
-        # round_trip_load to preserve key order:
-        data = round_trip_load(yaml)
+        data = YAML().load(yaml)
         output_yaml = yaml
     else:
         output_yaml = safe_dump(data, sort_keys=False)
@@ -27,8 +26,7 @@ def metadata_example(cog, data=None, yaml=None):
 
 def config_example(cog, input):
     if type(input) is str:
-        # round_trip_load to preserve key order:
-        data = round_trip_load(input)
+        data = YAML().load(input)
         output_yaml = input
     else:
         data = input