Use path.prettyUri in stack_trace.

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 67438c37e0bcfd19ca7d0cdf165c0ece143bec3c..5b376e2eee86a97c55a03d96ea8adca573398bdd 100644
--- a/pkg/stack_trace/lib/src/frame.dart
+++ b/pkg/stack_trace/lib/src/frame.dart
@@ -88,11 +88,7 @@ class Frame {
   ///
   /// This will usually be the string form of [uri], but a relative URI will be
   /// used if possible.
-  String get library {
-    if (uri.scheme != Uri.base.scheme) return uri.toString();
-    if (path.style == path.Style.url) return path.relative(uri.toString());
-    return path.relative(path.fromUri(uri));
-  }
+  String get library => path.prettyUri(uri);
 
   /// Returns the name of the package this stack frame comes from, or `null` if
   /// this stack frame doesn't come from a `package:` URL.