Add ///
diff --git a/lib/package_config_types.dart b/lib/package_config_types.dart
index 38b68ce..976009b 100644
--- a/lib/package_config_types.dart
+++ b/lib/package_config_types.dart
@@ -4,7 +4,7 @@
 
 /// A package configuration is a way to assign file paths to package URIs,
 /// and vice-versa.
-
+///
 /// {@canonicalFor package_config.InvalidLanguageVersion}
 /// {@canonicalFor package_config.LanguageVersion}
 /// {@canonicalFor package_config.Package}