Fix doc build

Change-Id: Id6826ffb3e0fd68d7bbe536dfde8868856fdd308
diff --git a/design/src/android/support/design/widget/FloatingActionButton.java b/design/src/android/support/design/widget/FloatingActionButton.java
index fbb4b5f..998fc2f 100644
--- a/design/src/android/support/design/widget/FloatingActionButton.java
+++ b/design/src/android/support/design/widget/FloatingActionButton.java
@@ -653,7 +653,7 @@
     /**
      * Returns the backward compatible elevation of the FloatingActionButton.
      *
-     * @returns the backward compatible elevation in pixels.
+     * @return the backward compatible elevation in pixels.
      * @attr ref android.support.design.R.styleable#FloatingActionButton_elevation
      * @see #setFloatingActionButtonElevation(float)
      */