fix test

Author: mdebbar

lib/web_ui/test/text/canvas_paragraph_builder_test.dart

@@ -220,7 +220,7 @@ void testMain() async {
     paragraph.layout(ParagraphConstraints(width: 70.0));
     expect(
       paragraph.toDomElement().outerHtml,
-      '<p style="font-size: 13px; $paragraphStyle">'
+      '<p style="font-size: 13px; $paragraphStyle width: 70px;">'
       '<span style="$defaultColor font-size: 13px; font-weight: bold; $defaultFontFamily">'
       'Hello'
       '</span>'
@@ -349,7 +349,7 @@ void testMain() async {
     paragraph.layout(ParagraphConstraints(width: 180.0));
     expect(
       paragraph.toDomElement().outerHtml,
-      '<p style="font-size: 13px; $paragraphStyle">'
+      '<p style="font-size: 13px; $paragraphStyle width: 180px;">'
       '<span style="$defaultColor font-size: 13px; $defaultFontFamily">'
       'First<br>Second <br>'
       '</span>'