Format all files under tools and utils directory.

tools/dom/src/NodeValidatorBuilder.dart

Index: tools/dom/src/NodeValidatorBuilder.dart
diff --git a/tools/dom/src/NodeValidatorBuilder.dart b/tools/dom/src/NodeValidatorBuilder.dart
index bcf807c5472398fe502c473d9883a18f6f4a83c1..dd1cf564bc7cab1e7bec6a66d41db901f441a80f 100644
--- a/tools/dom/src/NodeValidatorBuilder.dart
+++ b/tools/dom/src/NodeValidatorBuilder.dart
@@ -154,9 +154,9 @@ class NodeValidatorBuilder implements NodeValidator {
       Iterable<String> uriAttributes}) {
     var tagNameUpper = tagName.toUpperCase();
     var attrs = attributes
-        ?.map /*<String>*/ ((name) => '$tagNameUpper::${name.toLowerCase()}');
+        ?.map/*<String>*/((name) => '$tagNameUpper::${name.toLowerCase()}');
     var uriAttrs = uriAttributes
-        ?.map /*<String>*/ ((name) => '$tagNameUpper::${name.toLowerCase()}');
+        ?.map/*<String>*/((name) => '$tagNameUpper::${name.toLowerCase()}');
     if (uriPolicy == null) {
       uriPolicy = new UriPolicy();
     }
@@ -180,9 +180,9 @@ class NodeValidatorBuilder implements NodeValidator {
     var baseNameUpper = baseName.toUpperCase();
     var tagNameUpper = tagName.toUpperCase();
     var attrs = attributes
-        ?.map /*<String>*/ ((name) => '$baseNameUpper::${name.toLowerCase()}');
+        ?.map/*<String>*/((name) => '$baseNameUpper::${name.toLowerCase()}');
     var uriAttrs = uriAttributes
-        ?.map /*<String>*/ ((name) => '$baseNameUpper::${name.toLowerCase()}');
+        ?.map/*<String>*/((name) => '$baseNameUpper::${name.toLowerCase()}');
     if (uriPolicy == null) {
       uriPolicy = new UriPolicy();
     }