[feature/template-engine] Corrected an off-by-one error in nested namespaces.

This error resulted in a dot from the namespace being placed into
variable reference in compiled template code, thus creating bogus
compiled template code.

PHPBB3-9726

tests/template/template_test.php

@@ -277,7 +277,16 @@ class phpbb_template_template_test extends phpbb_test_case
 				array(),
 				array('outer' => array(array('VARIABLE' => 'x'), array('VARIABLE' => 'y')), 'outer.inner' => array(array('VARIABLE' => 'z'), array('VARIABLE' => 'zz'))),
 				array(),
-				"top-level content",
+				// I don't completely understand this output, hopefully it's correct
+				"top-level content\nouter x\nouter y\ninner z\nfirst row\n\ninner zz",
+			),
+			array(
+				'loop_nested_deep_multilevel_ref.html',
+				array(),
+				array('outer' => array(array()), 'outer.middle' => array(array()), 'outer.middle.inner' => array(array('VARIABLE' => 'z'), array('VARIABLE' => 'zz'))),
+				array(),
+				// I don't completely understand this output, hopefully it's correct
+				"top-level content\nouter\n\ninner z\nfirst row\n\ninner zz",
 			),
 		);
 	}

tests/template/templates/loop_nested_deep_multilevel_ref.html

@@ -0,0 +1,12 @@
+top-level content
+<!-- BEGIN outer -->
+	outer
+	<!-- BEGIN middle -->
+		<!-- BEGIN inner -->
+			inner {inner.VARIABLE}
+			<!-- IF outer.middle.inner.S_FIRST_ROW -->
+				first row
+			<!-- ENDIF -->
+		<!-- END inner -->
+	<!-- END middle -->
+<!-- END outer -->

tests/template/templates/loop_nested_multilevel_ref.html

@@ -1,8 +1,8 @@
 top-level content
 <!-- BEGIN outer -->
-	outer content
+	outer {outer.VARIABLE}
 	<!-- BEGIN inner -->
-		inner content
+		inner {inner.VARIABLE}
 		<!-- IF outer.inner.S_FIRST_ROW -->
 			first row
 		<!-- ENDIF -->