Reduce amount of empty space in which keypresses are detected

Bug: 6942329
Change-Id: Ie92ccf43f307b8ceb9a311c30390d0cb2abf2cd7
diff --git a/java/res/xml-sw600dp/row_symbols4.xml b/java/res/xml-sw600dp/row_symbols4.xml
index 73a5b17..f138d8e 100644
--- a/java/res/xml-sw600dp/row_symbols4.xml
+++ b/java/res/xml-sw600dp/row_symbols4.xml
@@ -41,6 +41,8 @@
             latin:moreKeys="!text/more_keys_for_tablet_double_quote" />
         <Key
             latin:keyLabel="_" />
-        <!-- Here is empty space. -->
+        <!-- Note: This Spacer prevents the above key from being marked as a right edge key. -->
+        <Spacer
+            latin:keyWidth="fillRight" />
     </Row>
 </merge>