Roll Observatory packages and add a roll script

packages/petitparser/lib/src/reflection/optimize.dart

Index: packages/petitparser/lib/src/reflection/optimize.dart
diff --git a/petitparser/lib/src/reflection/optimize.dart b/packages/petitparser/lib/src/reflection/optimize.dart
similarity index 76%
rename from petitparser/lib/src/reflection/optimize.dart
rename to packages/petitparser/lib/src/reflection/optimize.dart
index 1ae77e7e542da7a446799f1813b9181da1b64bfa..c9dd84795aeef4a451406b99f81341c6193c3178 100644
--- a/petitparser/lib/src/reflection/optimize.dart
+++ b/packages/petitparser/lib/src/reflection/optimize.dart
@@ -1,8 +1,6 @@
-part of reflection;
+part of petitparser.reflection;
 
-/**
- * Returns a copy of [parser] with all settable parsers removed.
- */
+/// Returns a copy of [parser] with all settable parsers removed.
 Parser removeSettables(Parser parser) {
   return transformParser(parser, (each) {
     while (each is SettableParser) {
@@ -12,9 +10,7 @@ Parser removeSettables(Parser parser) {
   });
 }
 
-/**
- * Returns a copy of [parser] with all duplicates parsers collapsed.
- */
+/// Returns a copy of [parser] with all duplicates parsers collapsed.
 Parser removeDuplicates(Parser parser) {
   var uniques = new Set();
   return transformParser(parser, (source) {