fix comment

Author: chunhtai

lib/web_ui/lib/src/engine/text/font_collection.dart

@@ -200,9 +200,9 @@ class FontManager {
     final html.FontFace fontFace = html.FontFace(family, list);
     return fontFace.load().then((_) {
       html.document.fonts.add(fontFace);
-      // It is possible there were paragraph measurements for this new font
-      // before it is loaded. They were measured using fallback font, so we
-      // should clear the cache
+      // There might be paragraph measurements for this new font before it is
+      // loaded. They were measured using fallback font, so we should clear the
+      // cache.
       TextMeasurementService.clearCache();
     }, onError: (dynamic exception) {
       // Failures here will throw an html.DomException which confusingly

lib/web_ui/test/text/font_loading_test.dart

@@ -12,7 +12,7 @@ import 'package:ui/src/engine.dart';
 Future<void> main() async {
   await ui.webOnlyInitializeTestDomRenderer();
   group('loadFontFromList', () {
-    const String _testFontUrl = 'packages/ui/assets/Roboto-Regular.ttf';
+    const String _testFontUrl = 'packages/ui/assets/ahem.ttf';
 
     tearDown(() {
       html.document.fonts.clear();