Removed fixed dependencies

packages/dart_style/test/splitting/members.unit

 40 columns                              |
 >>> prefers to wrap at => before params
 class Foo {
   Stream methodName(AssetId id) => methodBodyHereItIs;
 }
 <<<
 class Foo {
   Stream methodName(AssetId id) =>
       methodBodyHereItIs;
 }
 >>> can split on getter
 class Foo {
   VeryLongTypeAnnotation get veryLongGetter => null;
 }
 <<<
 class Foo {
   VeryLongTypeAnnotation
       get veryLongGetter => null;
 }
 >>> can split on setter
 class Foo {
   VeryLongTypeAnnotation set veryLongSetter(v) {}
 }
 <<<
 class Foo {
   VeryLongTypeAnnotation
       set veryLongSetter(v) {}
-}
+}
+>>> do not split after "covariant" in field (at least for now) (skip: published version of analyzer doesn't support 'covariant yet')
+class Foo {
+  covariant var soMuchSoVeryLongFieldNameHere;
+  covariant VeryLongTypeAnnotation field;
+}
+<<<
+class Foo {
+  covariant var soMuchSoVeryLongFieldNameHere;
+  covariant VeryLongTypeAnnotation
+      field;
+}