Example code typo

Change "there where" to "there were" and added space between modify count and next word.

src/main/java/com/avaje/ebean/SqlUpdate.java

@@ -26,7 +26,7 @@ package com.avaje.ebean;
  * 
  * int modifiedCount = Ebean.execute(update);
  * 
- * String msg = "There where " + modifiedCount + "rows updated"
+ * String msg = "There were " + modifiedCount + " rows updated"
  * </pre>
  * 
  * @see Update
@@ -143,4 +143,4 @@ public interface SqlUpdate {
    */
   SqlUpdate setNullParameter(String name, int jdbcType);
 
-}
+}