Improve code according to mjpitz suggestions

Replace `# -- @ignore` with simple `@ignore`

README.md

@@ -322,10 +322,10 @@ the description for the field. The `@default` comment must follow.
 
 See [here](./example-charts/custom-template/values.yaml) for an example.
 ### Ignoring values
-In cases you would like to ignore certain values, you can mark it as ignored:
+In cases you would like to ignore certain values, you can mark it with @ignored tag:
 
 ```yaml
-# -- @ignored
+# @ignored
 service:
   port: 8080
 ```

example-charts/ignored-values-example/values.yaml

@@ -32,20 +32,20 @@ config:
     # -- user with access to the database with the same name
     - {name: hashbash, readwriteDatabases: [hashbash]}
 
-    # -- @ignore test
+    # @ignore test
     - {name: test, readDatabases: [test]}
 
-# -- @ignore
+# @ignore
 internalConfig:
   rpcPort: 8080
   # -- this should also be ignored
   generateData: true
 
-# -- @ignore
-ignoredConfig: 5
+# @ignore
+ignoredConfig: 6
 
 configWithAllValuesIgnored:
-  # -- @ignore
+  # @ignore
   ignoredOne: true
-  # -- @ignore
+  # @ignore
   ignoredTwo: "?"

pkg/helm/chart_info.go

@@ -146,23 +146,19 @@ func parseChartRequirementsFile(chartDirectory string, apiVersion string) (Chart
 	return chartRequirements, nil
 }
 
-func removeIgnored(rootNode *yaml.Node, rootKind yaml.Kind) {
-	var toDelete []int
-	for i, node := range rootNode.Content {
-		if strings.Contains(node.HeadComment, "# -- @ignore") {
-			toDelete = append(toDelete, i)
-			if rootKind == yaml.MappingNode {
-				toDelete = append(toDelete, i+1)
-			}
+func removeIgnored(rootNode *yaml.Node, parentKind yaml.Kind) {
+	newContent := make([]*yaml.Node , 0, len(rootNode.Content))
+	for i := 0; i < len(rootNode.Content); i++ {
+		node := rootNode.Content[i]
+		if !strings.Contains(node.HeadComment, "@ignore") {
+			removeIgnored(node, node.Kind)
+			newContent = append(newContent, node)
+		} else if parentKind == yaml.MappingNode {
+			// for parentKind each yaml key is represented by two nodes
+			i++
 		}
 	}
-	for i := len(toDelete) - 1; i >= 0; i-- {
-		var d int = toDelete[i]
-		rootNode.Content = append(rootNode.Content[:d], rootNode.Content[d+1:]...)
-	}
-	for _, node := range rootNode.Content {
-		removeIgnored(node, node.Kind)
-	}
+	rootNode.Content = newContent
 }
 
 func parseChartValuesFile(chartDirectory string) (yaml.Node, error) {