Fixed collect at document level

pkg/yqlib/operator_collect.go

@@ -29,7 +29,7 @@ func CollectOperator(d *dataTreeNavigator, matchMap *list.List, pathNode *PathTr
 			path = candidate.Path[:len(candidate.Path)-1]
 			document = candidate.Document
 		}
-		node.Content = append(node.Content, candidate.Node)
+		node.Content = append(node.Content, UnwrapDoc(candidate.Node))
 	}
 
 	collectC := &CandidateNode{Node: node, Document: document, Path: path}

pkg/yqlib/operator_collect_test.go

@@ -13,6 +13,15 @@ var collectOperatorScenarios = []expressionScenario{
 			"D0, P[], (!!seq)::[]\n",
 		},
 	},
+	{
+		skipDoc: true,
+		document:    "{a: apple}\n---\n{b: frog}",
+		
+		expression:  `[.]`,
+		expected: []string{
+			"D0, P[], (!!seq)::- {a: apple}\n- {b: frog}\n",
+		},
+	},
 	{
 		skipDoc:    true,
 		document:   ``,