[html5lib] triple slash comment style

pkg/third_party/html5lib/lib/src/constants.dart

Index: pkg/third_party/html5lib/lib/src/constants.dart
diff --git a/pkg/third_party/html5lib/lib/src/constants.dart b/pkg/third_party/html5lib/lib/src/constants.dart
index 9cc03ad80c0972511378d9236906c0d54b0edfb2..b8e4dbd2fa496831f3c8a5f01b53d5e13a935851 100644
--- a/pkg/third_party/html5lib/lib/src/constants.dart
+++ b/pkg/third_party/html5lib/lib/src/constants.dart
@@ -16,11 +16,9 @@ class ReparseException implements Exception {
 
 // TODO(jmesserly): assuming the programmatic name is not important, it would be
 // good to make these "static const" fields on an ErrorMessage class.
-/**
- * These are error messages emitted by [HtmlParser]. The values use Python style
- * string formatting, as implemented by [formatStr]. That function only supports
- * the subset of format functionality used here.
- */
+/// These are error messages emitted by [HtmlParser]. The values use Python
+/// style string formatting, as implemented by [formatStr]. That function only
+/// supports the subset of format functionality used here.
 const Map<String, String> errorMessages = const {
   "null-character":
      "Null character in input stream, replaced with U+FFFD.",