add clause rule to verbatim, comment, and blocktrans

test/corpus/verbatim.txt

@@ -9,8 +9,9 @@ Verbatim Basic
 (template
   (content)
   (verbatim_group
-    (push_verbatim)
-    (verbatim_content)
+    (verbatim_clause
+      (push_verbatim)
+      (verbatim_content))
     (pop_verbatim))
   (content))
 
@@ -25,7 +26,8 @@ Verbatim Empty
 (template
   (content)
   (verbatim_group
-    (push_verbatim)
+    (verbatim_clause
+      (push_verbatim))
     (pop_verbatim))
   (content))
 
@@ -43,8 +45,9 @@ Verbatim Ignores Tags
 (template
   (content)
   (verbatim_group
-    (push_verbatim)
-    (verbatim_content)
+    (verbatim_clause
+      (push_verbatim)
+      (verbatim_content))
     (pop_verbatim))
   (content))
 
@@ -59,8 +62,9 @@ Verbatim With Name
 (template
   (content)
   (verbatim_group
-    (push_verbatim)
-    (verbatim_content)
+    (verbatim_clause
+      (push_verbatim)
+      (verbatim_content))
     (pop_verbatim))
   (content))
 
@@ -77,7 +81,8 @@ Avoid template rendering via the {% verbatim %}{% endverbatim %} block.
 (template
   (content)
   (verbatim_group
-    (push_verbatim)
-    (verbatim_content)
+    (verbatim_clause
+      (push_verbatim)
+      (verbatim_content))
     (pop_verbatim))
   (content))