fixes: grouping separator preference

res/layout/calc_zero_digit_button.xml

@@ -8,7 +8,8 @@
 
 <org.solovyev.android.view.widgets.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
 													   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
-													   a:id="@+id/zeroDigitButton" a:text="0"
+													   a:id="@+id/zeroDigitButton"
+													   a:text="0"
 													   calc:textUp="."
 													   calc:textDown="000"
 													   calc:directionTextScale="0.5"

res/values/arrays.xml

@@ -24,7 +24,7 @@
 	<string-array name="p_grouping_separator_values">
 		<item>""</item>
 		<item>\'</item>
-		<item> </item>
+		<item>" "</item>
 	</string-array>
 
 </resources>