Roll Observatory packages and add a roll script

packages/petitparser/lib/src/debug/profile.dart

-part of debug;
+part of petitparser.debug;
 
-/**
- * Returns a transformed [parser] that when being used measures
- * the activation count and total time of each parser.
- *
- * For example, the snippet
- *
- *     var parser = letter() & word().star();
- *     profile(parser).parse('f1234567890');
- *
- * produces the following output:
- *
- *      1  2006  Instance of 'SequenceParser'
- *      1   697  Instance of 'PossessiveRepeatingParser'[0..*]
- *     11   406  Instance of 'CharacterParser'[letter or digit expected]
- *      1   947  Instance of 'CharacterParser'[letter expected]
- *
- * The first number refers to the number of activations of each parser, and
- * the second number is the microseconds spent in this parser and all its
- * children.
- */
+/// Returns a transformed [parser] that when being used measures
+/// the activation count and total time of each parser.
+///
+/// For example, the snippet
+///
+///     var parser = letter() & word().star();
+///     profile(parser).parse('f1234567890');
+///
+/// produces the following output:
+///
+///      1  2006  Instance of 'SequenceParser'
+///      1   697  Instance of 'PossessiveRepeatingParser'[0..*]
+///     11   406  Instance of 'CharacterParser'[letter or digit expected]
+///      1   947  Instance of 'CharacterParser'[letter expected]
+///
+/// The first number refers to the number of activations of each parser, and
+/// the second number is the microseconds spent in this parser and all its
+/// children.
 Parser profile(Parser root, [OutputHandler output = print]) {
   var count = new Map();
   var watch = new Map();
   var parsers = new List();
   return new ContinuationParser(transformParser(root, (parser) {
     parsers.add(parser);
     return new ContinuationParser(parser, (continuation, context) {
       count[parser]++;
       watch[parser].start();
       var result = continuation(context);
       watch[parser].stop();
       return result;
     });
   }), (continuation, context) {
     parsers.forEach((parser) {
       count[parser] = 0;
       watch[parser] = new Stopwatch();
     });
     var result = continuation(context);
     parsers.forEach((parser) {
       output('${count[parser]}\t'
           '${watch[parser].elapsedMicroseconds}\t'
-          '${parser}');
+          '$parser');
     });
     return result;
   });
 }