revise ADT migration message
b/18668828
and fix broken link

Change-Id: I64cba60ebdd0649a0394e0f4284160514f56099e
diff --git a/docs/html/sdk/index.jd b/docs/html/sdk/index.jd
index 97baeaf..dc7a6ca 100644
--- a/docs/html/sdk/index.jd
+++ b/docs/html/sdk/index.jd
@@ -430,7 +430,7 @@
 
 
 <p>If you have been using Eclipse with ADT, be aware that Android Studio is now the official IDE
-for Android, so you should migrate to Android Studio in order to continue to receive all the
+for Android, so you should migrate to Android Studio to receive all the
 latest IDE updates. For help moving projects,
 see <a href="{@docRoot}sdk/installing/migrate.html">Migrating to Android
 Studio</a>.</p>