updated code to modern standards and lint fixes

.vscode/settings.json

@@ -0,0 +1,53 @@
+{
+  "workbench.editor.scrollToSwitchTabs": true,
+  "workbench.editor.limit.enabled": true,
+  "dart.closingLabels": false,
+  // copied from: https://dartcode.org/docs/recommended-settings/
+  // Causes the debug view to automatically appear when a breakpoint is hit. This
+  // setting is global and not configurable per-language.
+  "debug.openDebug": "openOnDebugBreak",
+  "[yaml]": {
+    "editor.formatOnSave": true
+  },
+  "[dart]": {
+    // "editor.formatOnType": true,
+    // Disables built-in highlighting of words that match your selection. Without
+    // this, all instances of the selected text will be highlighted, interfering
+    // with Dart's ability to highlight only exact references to the selected variable.
+    "editor.selectionHighlight": false,
+    // By default, VS Code prevents code completion from popping open when in
+    // "snippet mode" (editing placeholders in inserted code). Setting this option
+    // to `false` stops that and allows completion to open as normal, as if you
+    // weren't in a snippet placeholder.
+    "editor.suggest.snippetsPreventQuickSuggestions": false,
+    // By default, VS Code will pre-select the most recently used item from code
+    // completion. This is usually not the most relevant item.
+    //
+    // "first" will always select top item
+    // "recentlyUsedByPrefix" will filter the recently used items based on the
+    //     text immediately preceeding where completion was invoked.
+    "editor.suggestSelection": "first",
+    // Allows pressing <TAB> to complete snippets such as `for` even when the
+    // completion list is not visible.
+    "editor.tabCompletion": "onlySnippets",
+    // By default, VS Code will populate code completion with words found in the
+    // current file when a language service does not provide its own completions.
+    // This results in code completion suggesting words when editing comments and
+    // strings. This setting will prevent that.
+    "editor.wordBasedSuggestions": "off"
+  },
+  "editor.bracketPairColorization.enabled": true,
+  "editor.codeActionsOnSave": {
+    "source.fixAll": "explicit",
+    "source.organizeImports": "explicit",
+    "quickfix.insertSemicolon": "explicit",
+    "source.fixAll.eslint": "explicit"
+  },
+  "editor.formatOnSave": true,
+  "prettier.singleQuote": true,
+  "prettier.trailingComma": "all",
+  "dart.runPubGetOnPubspecChanges": "never",
+  "xmlTools.splitXmlnsOnFormat": false,
+  "xmlTools.splitAttributesOnFormat": true,
+  "arb-editor.suppressedWarnings": "all"
+}

analysis_options.yaml

@@ -1,4 +1,3 @@
-include: package:flutter_lints/flutter.yaml
-
+include: package:dfc_lints/rules.yaml
 # Additional information about this file can be found at
 # https://dart.dev/guides/language/analysis-options

example/assets/code.dart

@@ -1,16 +1,14 @@
 import 'package:flutter/foundation.dart';
 
 class ReEditor {
+  ReEditor(this.foo, this.bar);
 
   final String foo;
   final String bar;
 
-  ReEditor(this.foo, this.bar);
-
   void hello(String name) {
     if (kDebugMode) {
       print('hello $name');
     }
   }
-
-}
+}