Roll Observatory packages and add a roll script

packages/dart_style/test/regression/0100/0171.unit

Index: packages/dart_style/test/regression/0100/0171.unit
diff --git a/packages/dart_style/test/regression/0100/0171.unit b/packages/dart_style/test/regression/0100/0171.unit
new file mode 100644
index 0000000000000000000000000000000000000000..1eb043bcc1b3083fcecd3a4f5a446f876ede2115
--- /dev/null
+++ b/packages/dart_style/test/regression/0100/0171.unit
@@ -0,0 +1,32 @@
+>>>
+/// Reference type
+enum RefType {
+  /// Indicates a reference to type: *T &*
+  ref,
+  /// Indicates a const reference to type: *T const&*
+  cref,
+  /// Indicates a volatile reference to type: *T volatile&*
+  vref,
+  /// Indicates a const volatile reference to type: *T const volatile&*
+  cvref,
+  /// Indicates not a reference
+  value
+}
+<<<
+/// Reference type
+enum RefType {
+  /// Indicates a reference to type: *T &*
+  ref,
+
+  /// Indicates a const reference to type: *T const&*
+  cref,
+
+  /// Indicates a volatile reference to type: *T volatile&*
+  vref,
+
+  /// Indicates a const volatile reference to type: *T const volatile&*
+  cvref,
+
+  /// Indicates not a reference
+  value
+}