Fix Directory, File and Link constructor text.

sdk/lib/io/directory.dart

Index: sdk/lib/io/directory.dart
diff --git a/sdk/lib/io/directory.dart b/sdk/lib/io/directory.dart
index e977d2fe86b0cf2966c6f498b179f77e69ab72ba..fe934a678617e611f06d69b3e03ae5753fab20ff 100644
--- a/sdk/lib/io/directory.dart
+++ b/sdk/lib/io/directory.dart
@@ -118,9 +118,11 @@ abstract class Directory extends FileSystemEntity {
   final String path;
 
   /**
-   * Creates a directory object. The path is either an absolute path,
-   * or it is a relative path which is interpreted relative to the directory
-   * in which the Dart VM was started.
+   * Creates a [Directory] object.
+   *
+   * The path is either an absolute path,

[Søren Gjesse, 2014/05/13 15:45:02]

How about rephrasing to something like:

If the path is absolute ...

If the path is relative ...

[Anders Johnsen, 2014/05/14 08:51:10]

Done.

+   * or it is a relative path which is interpreted relative to the current
+   * working directory (see [Directory.current]).
    */
   factory Directory(String path) => new _Directory(path);