Fix line folding (#87)

* Fix line folding to match specification

* Add test case and remove TODO for fix

* Remove indent creation from utility function

* Update changelog

* Return null if strings cannot be encoded in desired `ScalarStyle`

> Fix invalid encoding for string with trailing line breaks or white-space

* Clean up code

> Update `_tryYamlEncodedPlain` to return null if string cannot be encoded
> Make `_yamlEncodeFlowScalar` and `yamlEncodeBlockScalar` code concise

* Remove unnecessary assertions and add docs

> `_yamlEncodeFlowScalar` and `_yamlEncodeBlockScalar` always encode YamlScalars

* Minor refactoring

* Fix condition check for encoding as literal/folded

* Remove keep chomping indicator references

* Update lib/src/strings.dart

---------

Co-authored-by: Jonas Finnemann Jensen <jonasfj@google.com>
Co-authored-by: Jonas Finnemann Jensen <jopsen@gmail.com>

CHANGELOG.md

@@ -5,6 +5,13 @@
   list.
   ([#69](https://github.com/dart-lang/yaml_edit/issues/69))
 
+- Fix error thrown when inserting in nested list using `spliceList` method
+  ([#83](https://github.com/dart-lang/yaml_edit/issues/83))
+
+- Fix error thrown when string has spaces when applying `ScalarStyle.FOLDED`.
+  ([#41](https://github.com/dart-lang/yaml_edit/issues/41)). Resolves
+  ([[#86](https://github.com/dart-lang/yaml_edit/issues/86)]).
+
 ## 2.2.1
 
 - Require Dart 3.0

lib/src/editor.dart

@@ -244,7 +244,7 @@ class YamlEditor {
       final end = getContentSensitiveEnd(_contents);
       final lineEnding = getLineEnding(_yaml);
       final edit = SourceEdit(
-          start, end - start, yamlEncodeBlockString(valueNode, 0, lineEnding));
+          start, end - start, yamlEncodeBlock(valueNode, 0, lineEnding));
 
       return _performEdit(edit, path, valueNode);
     }

lib/src/list_mutations.dart

@@ -29,8 +29,8 @@ SourceEdit updateInList(
     final listIndentation = getListIndentation(yaml, list);
     final indentation = listIndentation + getIndentation(yamlEdit);
     final lineEnding = getLineEnding(yaml);
-    valueString = yamlEncodeBlockString(
-        wrapAsYamlNode(newValue), indentation, lineEnding);
+    valueString =
+        yamlEncodeBlock(wrapAsYamlNode(newValue), indentation, lineEnding);
 
     /// We prefer the compact nested notation for collections.
     ///
@@ -52,7 +52,7 @@ SourceEdit updateInList(
 
     return SourceEdit(offset, end - offset, valueString);
   } else {
-    valueString = yamlEncodeFlowString(newValue);
+    valueString = yamlEncodeFlow(newValue);
     return SourceEdit(offset, currValue.span.length, valueString);
   }
 }
@@ -141,7 +141,7 @@ SourceEdit _appendToBlockList(
   final newIndentation = listIndentation + getIndentation(yamlEdit);
   final lineEnding = getLineEnding(yaml);
 
-  var valueString = yamlEncodeBlockString(item, newIndentation, lineEnding);
+  var valueString = yamlEncodeBlock(item, newIndentation, lineEnding);
   if (isCollection(item) && !isFlowYamlCollectionNode(item) && !isEmpty(item)) {
     valueString = valueString.substring(newIndentation);
   }
@@ -151,7 +151,7 @@ SourceEdit _appendToBlockList(
 
 /// Formats [item] into a new node for flow lists.
 String _formatNewFlow(YamlList list, YamlNode item, [bool isLast = false]) {
-  var valueString = yamlEncodeFlowString(item);
+  var valueString = yamlEncodeFlow(item);
   if (list.isNotEmpty) {
     if (isLast) {
       valueString = ', $valueString';

lib/src/map_mutations.dart

@@ -54,7 +54,7 @@ SourceEdit _addToBlockMap(
   final yaml = yamlEdit.toString();
   final newIndentation =
       getMapIndentation(yaml, map) + getIndentation(yamlEdit);
-  final keyString = yamlEncodeFlowString(wrapAsYamlNode(key));
+  final keyString = yamlEncodeFlow(wrapAsYamlNode(key));
   final lineEnding = getLineEnding(yaml);
 
   var formattedValue = ' ' * getMapIndentation(yaml, map);
@@ -83,7 +83,7 @@ SourceEdit _addToBlockMap(
     }
   }
 
-  var valueString = yamlEncodeBlockString(newValue, newIndentation, lineEnding);
+  var valueString = yamlEncodeBlock(newValue, newIndentation, lineEnding);
   if (isCollection(newValue) &&
       !isFlowYamlCollectionNode(newValue) &&
       !isEmpty(newValue)) {
@@ -100,8 +100,8 @@ SourceEdit _addToBlockMap(
 /// map.
 SourceEdit _addToFlowMap(
     YamlEditor yamlEdit, YamlMap map, YamlNode keyNode, YamlNode newValue) {
-  final keyString = yamlEncodeFlowString(keyNode);
-  final valueString = yamlEncodeFlowString(newValue);
+  final keyString = yamlEncodeFlow(keyNode);
+  final valueString = yamlEncodeFlow(newValue);
 
   // The -1 accounts for the closing bracket.
   if (map.isEmpty) {
@@ -131,8 +131,8 @@ SourceEdit _replaceInBlockMap(
       getMapIndentation(yaml, map) + getIndentation(yamlEdit);
 
   final keyNode = getKeyNode(map, key);
-  var valueAsString = yamlEncodeBlockString(
-      wrapAsYamlNode(newValue), newIndentation, lineEnding);
+  var valueAsString =
+      yamlEncodeBlock(wrapAsYamlNode(newValue), newIndentation, lineEnding);
   if (isCollection(newValue) &&
       !isFlowYamlCollectionNode(newValue) &&
       !isEmpty(newValue)) {
@@ -163,7 +163,7 @@ SourceEdit _replaceInBlockMap(
 SourceEdit _replaceInFlowMap(
     YamlEditor yamlEdit, YamlMap map, Object? key, YamlNode newValue) {
   final valueSpan = map.nodes[key]!.span;
-  final valueString = yamlEncodeFlowString(newValue);
+  final valueString = yamlEncodeFlow(newValue);
 
   return SourceEdit(valueSpan.start.offset, valueSpan.length, valueString);
 }