Remove typo in Index documentation

Change-Id: I2c9d886c3871470c8f3007e710485e63dc6cb0d2
Test: n/a
diff --git a/room/room-common/src/main/java/androidx/room/Index.java b/room/room-common/src/main/java/androidx/room/Index.java
index dc9206a..04fe4e8 100644
--- a/room/room-common/src/main/java/androidx/room/Index.java
+++ b/room/room-common/src/main/java/androidx/room/Index.java
@@ -64,7 +64,7 @@
      * Note that there is no value in providing a sort order on a single-column index. Column sort
      * order of an index are relevant on multi-column indices and specifically in those that are
      * considered 'covering indices', for such indices specifying an order can have performance
-     * improvements on queries containing ORDER BY clauses.SchemaDifferTest See
+     * improvements on queries containing ORDER BY clauses. See
      * <a href="https://www.sqlite.org/queryplanner.html#_sorting_by_index">SQLite documentation</a>
      * for details on sorting by index and the usage of the sort order by the query optimizer.
      * <p>