Issue 27536. Quick Fix for 'Avoid using braces in interpolation when not needed'.

pkg/analysis_server/test/services/correction/fix_test.dart

Index: pkg/analysis_server/test/services/correction/fix_test.dart
diff --git a/pkg/analysis_server/test/services/correction/fix_test.dart b/pkg/analysis_server/test/services/correction/fix_test.dart
index ea55ec18e2cc0a751211f7cb2c699ed714ffdf64..dbfb129d165dc07008bc9e2a35f09455e67c7f4e 100644
--- a/pkg/analysis_server/test/services/correction/fix_test.dart
+++ b/pkg/analysis_server/test/services/correction/fix_test.dart
@@ -5273,10 +5273,10 @@ class LintFixTest extends BaseFixProcessorTest {
     resultCode = SourceEdit.applySequence(testCode, change.edits[0].edits);
   }
 
-  void findLint(String src, String lintCode) {
+  void findLint(String src, String lintCode, {int length: 1}) {
     int errorOffset = src.indexOf('/*LINT*/');
     resolveTestUnit(src.replaceAll('/*LINT*/', ''));
-    error = new AnalysisError(testUnit.element.source, errorOffset, 1,
+    error = new AnalysisError(testUnit.element.source, errorOffset, length,
         new LintCode(lintCode, '<ignored>'));
   }
 
@@ -5462,6 +5462,23 @@ class Sub extends Test {
 ''');
   }
 
+  test_lint_removeInterpolationBraces() async {
+    String src = r'''
+main() {
+  var v = 42;
+  print('v: /*LINT*/${ v}');
+}
+''';
+    findLint(src, LintNames.unnecessary_brace_in_string_interp, length: 4);
+    await applyFix(DartFixKind.LINT_REMOVE_INTERPOLATION_BRACES);
+    verifyResult(r'''
+main() {
+  var v = 42;
+  print('v: $v');
+}
+''');
+  }
+
   void verifyResult(String expectedResult) {
     expect(resultCode, expectedResult);
   }