Fix up utils

Author: jcollins-g

lib/src/utils.dart

@@ -41,17 +41,13 @@ String stripComments(String str) {
   return buf.toString().trim();
 }
 
-/// This is special because it knows not to leave HTML tags open.
-/// Do not call this on unsanitized HTML.
 String truncateString(String str, int length) {
-  assert(str == null || !str.contains("<"));
-  if (str != null) {
-    if (str.length > length) {
-      return '${str.substring(0, length)}…';
-    }
-    return str;
+  if (str != null && str.length > length) {
+    // Do not call this on unsanitized HTML.
+    assert(!str.contains("<"));
+    return '${str.substring(0, length)}…';
   }
-  return null;
+  return str;
 }
 
 String pluralize(String word, int count) => count == 1 ? word : '${word}s';

pubspec.lock

@@ -350,4 +350,4 @@ packages:
     source: hosted
     version: "2.1.13"
 sdks:
-  dart: ">=1.23.0 <=2.0.0-dev.7.0"
+  dart: ">=1.23.0 <=2.0.0-dev.8.0"