Fix cleaned YAML given limitations of Jackson

Author: blacelle

testlib/src/main/resources/yaml/array_with_bracket.clean.yaml

@@ -1,2 +1,12 @@
-episodes: [1, 2, 3, 4, 5, 6, 7]
-best-jedi: {name: Obi-Wan, side: light} 
+---
+episodes:
+- 1
+- 2
+- 3
+- 4
+- 5
+- 6
+- 7
+best-jedi:
+  name: Obi-Wan
+  side: light 

testlib/src/main/resources/yaml/multiple_documents.clean.yaml

@@ -1,8 +1,8 @@
-document: this is document 1
 ---
+document: this is document 1
 
+---
 document: this is document 2
 
 ---
-
 document: this is document 3

testlib/src/main/resources/yaml/separator_comments.clean.yaml

@@ -1,9 +1,7 @@
 ---
-
 hr:
   - Mark McGwire
-  # Following node labeled SS
-  - &SS Sammy Sosa
+  - Sammy Sosa
 rbi:
-  - *SS # Subsequent occurrence
+  - Sammy Sosa
   - Ken Griffey