pkg/docgen: more cleanup

pkg/docgen/test/generate_json_test.dart

 import 'dart:convert';
 import 'dart:io';
 
 import 'package:path/path.dart' as p;
 import 'package:scheduled_test/descriptor.dart' as d;
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:unittest/matcher.dart';
 
 import 'util.dart';
 import '../lib/docgen.dart' as dg;
@@ skipping 14 matching lines @@
      currentSchedule.onComplete.schedule(() {
        d.defaultRoot = null;
        return tempDir.delete(recursive: true);
      });
    });
 
   test('json output', () {
     schedule(() {
       var codeDir = getMultiLibraryCodePath();
       expect(FileSystemEntity.isDirectorySync(codeDir), isTrue);
-      return dg.docgen(['$codeDir/'], out: p.join(d.defaultRoot, 'docs'));
+      return dg.docgen([codeDir], out: p.join(d.defaultRoot, 'docs'));
     });
 
     d.dir('docs', [
         d.matcherFile('index.json', _isJsonMap),
         d.matcherFile('index.txt', _hasSortedLines),
         d.matcherFile('library_list.json', _isJsonMap),
         d.matcherFile('test_lib-bar.C.json', _isJsonMap),
         d.matcherFile('test_lib-bar.json', _isJsonMap),
         d.matcherFile('test_lib-foo.B.json', _isJsonMap),
         d.matcherFile('test_lib-foo.json', _isJsonMap),
         d.matcherFile('test_lib.A.json', _isJsonMap),
         d.matcherFile('test_lib.B.json', _isJsonMap),
         d.matcherFile('test_lib.C.json', _isJsonMap),
         d.matcherFile('test_lib.json', _isJsonMap),
     ]).validate();
 
   });
 
   test('typedef gen', () {
     schedule(() {
       var codeDir = getMultiLibraryCodePath();
       expect(FileSystemEntity.isDirectorySync(codeDir), isTrue);
-      return dg.docgen(['$codeDir/'], out: p.join(d.defaultRoot, 'docs'));
+      return dg.docgen([codeDir], out: p.join(d.defaultRoot, 'docs'));
     });
 
     schedule(() {
       var path = p.join(d.defaultRoot, 'docs', 'test_lib-bar.json');
       var dartCoreJson = new File(path).readAsStringSync();
 
       var testLibBar = JSON.decode(dartCoreJson) as Map<String, dynamic>;
 
       //
       // Validate function doc references
@@ skipping 35 matching lines @@
   return orderedMatcher.matches(lines, {});
 }, 'String has sorted lines');
 
 final Matcher _isJsonMap = predicate((input) {
   try {
     return JSON.decode(input) is Map;
   } catch (e) {
     return false;
   }
 }, 'Output is JSON encoded Map');