Fix error handling for formatting and update the spec

pkg/analysis_server/lib/src/generated_protocol.dart

Index: pkg/analysis_server/lib/src/generated_protocol.dart
diff --git a/pkg/analysis_server/lib/src/generated_protocol.dart b/pkg/analysis_server/lib/src/generated_protocol.dart
index 0e2493b4a6a8c54810ccd155ad83246b0b3e4159..57fcf609157d3fc8745f354c1e9dd9638f30d96b 100644
--- a/pkg/analysis_server/lib/src/generated_protocol.dart
+++ b/pkg/analysis_server/lib/src/generated_protocol.dart
@@ -12094,6 +12094,7 @@ class RequestError implements HasToJson {
  * enum {
  *   CONTENT_MODIFIED
  *   FORMAT_INVALID_FILE
+ *   FORMAT_WITH_ERRORS
  *   GET_ERRORS_INVALID_FILE
  *   INVALID_ANALYSIS_ROOT
  *   INVALID_EXECUTION_CONTEXT
@@ -12127,6 +12128,11 @@ class RequestErrorCode implements Enum {
   static const FORMAT_INVALID_FILE = const RequestErrorCode._("FORMAT_INVALID_FILE");
 
   /**
+   * An "edit.format" request specified a file that contains syntax errors.
+   */
+  static const FORMAT_WITH_ERRORS = const RequestErrorCode._("FORMAT_WITH_ERRORS");
+
+  /**
    * An "analysis.getErrors" request specified a FilePath which does not match
    * a file currently subject to analysis.
    */
@@ -12232,7 +12238,7 @@ class RequestErrorCode implements Enum {
   /**
    * A list containing all of the enum values that are defined.
    */
-  static const List<RequestErrorCode> VALUES = const <RequestErrorCode>[CONTENT_MODIFIED, FORMAT_INVALID_FILE, GET_ERRORS_INVALID_FILE, INVALID_ANALYSIS_ROOT, INVALID_EXECUTION_CONTEXT, INVALID_OVERLAY_CHANGE, INVALID_PARAMETER, INVALID_REQUEST, NO_INDEX_GENERATED, REFACTORING_REQUEST_CANCELLED, SERVER_ALREADY_STARTED, SERVER_ERROR, SORT_MEMBERS_INVALID_FILE, SORT_MEMBERS_PARSE_ERRORS, UNANALYZED_PRIORITY_FILES, UNKNOWN_REQUEST, UNKNOWN_SOURCE, UNSUPPORTED_FEATURE];
+  static const List<RequestErrorCode> VALUES = const <RequestErrorCode>[CONTENT_MODIFIED, FORMAT_INVALID_FILE, FORMAT_WITH_ERRORS, GET_ERRORS_INVALID_FILE, INVALID_ANALYSIS_ROOT, INVALID_EXECUTION_CONTEXT, INVALID_OVERLAY_CHANGE, INVALID_PARAMETER, INVALID_REQUEST, NO_INDEX_GENERATED, REFACTORING_REQUEST_CANCELLED, SERVER_ALREADY_STARTED, SERVER_ERROR, SORT_MEMBERS_INVALID_FILE, SORT_MEMBERS_PARSE_ERRORS, UNANALYZED_PRIORITY_FILES, UNKNOWN_REQUEST, UNKNOWN_SOURCE, UNSUPPORTED_FEATURE];
 
   final String name;
 
@@ -12244,6 +12250,8 @@ class RequestErrorCode implements Enum {
         return CONTENT_MODIFIED;
       case "FORMAT_INVALID_FILE":
         return FORMAT_INVALID_FILE;
+      case "FORMAT_WITH_ERRORS":
+        return FORMAT_WITH_ERRORS;
       case "GET_ERRORS_INVALID_FILE":
         return GET_ERRORS_INVALID_FILE;
       case "INVALID_ANALYSIS_ROOT":