Enforce non-whitespace formatting rules

pubspec.yaml

@@ -29,9 +29,9 @@ dependencies:
 
 dev_dependencies:
   archive: ">=1.0.0 <3.0.0"
-  analyzer: ">=0.30.0 <0.33.0"
+  analyzer: ">=0.30.0 <0.34.0"
   crypto: ">=0.9.2 <3.0.0"
-  dart_style: "^1.0.0"
+  dart_style: "^1.2.0"
   grinder: "^0.8.0"
   http: "^0.11.0"
   js: "^0.6.0"

tool/assert-formatted.sh

@@ -3,7 +3,7 @@
 # license that can be found in the LICENSE file or at
 # https://opensource.org/licenses/MIT.
 
-unformatted=`pub run dart_style:format -n bin/ lib/ tool/ test/`
+unformatted=`pub run dart_style:format --fix -n bin/ lib/ tool/ test/`
 if [[ -z "$unformatted" ]]; then
     exit 0
 else

tool/grind.dart

@@ -26,7 +26,7 @@ all() {}
 format() {
   Pub.run('dart_style',
       script: 'format',
-      arguments: ['--overwrite']
+      arguments: ['--overwrite', '--fix']
         ..addAll(existingSourceDirs.map((dir) => dir.path)));
 }