Fix the pkg/stack_trace tests.

pkg/stack_trace/lib/src/frame.dart

Index: pkg/stack_trace/lib/src/frame.dart
diff --git a/pkg/stack_trace/lib/src/frame.dart b/pkg/stack_trace/lib/src/frame.dart
index 8d3f042a20533b9ba0dcc9d0b71c18164f761e84..d750b9178d56c1bd55af01da828f224be256717b 100644
--- a/pkg/stack_trace/lib/src/frame.dart
+++ b/pkg/stack_trace/lib/src/frame.dart
@@ -42,7 +42,7 @@ class Frame {
   /// Returns a human-friendly description of the library that this stack frame
   /// comes from.
   ///
-  /// This will usually be the string form of [uri], but a relative path will be
+  /// This will usually be the string form of [uri], but a relative URI will be
   /// used if possible.
   String get library {
     if (uri.scheme != 'file') return uri.toString();