enforce key uniqueness on with expression, fix scanner.c

test/corpus/blocktranslate.txt

@@ -438,3 +438,12 @@ Blocktrans Repeating An Option Of The Tag Before It
   (blocktranslate_group
     (content))
   (content))
+
+==================
+Blocktrans With A Binding Twice
+:error
+==================
+
+{% blocktrans with a=1 a=2 %}x{% endblocktrans %}
+
+---

test/corpus/csp_nonce_attr.txt

@@ -79,3 +79,12 @@ Csp Nonce Attr Rejects Repeated Keyword
 
 (ERROR)
 
+
+==================
+Csp Nonce Attr With Media Twice
+:error
+==================
+
+{% csp_nonce_attr media="a" media="b" %}
+
+---

test/corpus/include.txt

@@ -162,31 +162,14 @@ Include With Only Before With
   (content))
 
 ==================
-Include With A Repeated Binding
+Include With A Binding Twice
+:error
 ==================
 
 {% include "t.html" with a=1 a=2 %}
 
 ---
 
-(template
-  (content)
-  (include
-    (filtered_value
-      (value
-        (literal
-          (string))))
-    variable: (identifier)
-    (filtered_value
-      (value
-        (literal
-          (number))))
-    variable: (identifier)
-    (filtered_value
-      (value
-        (literal
-          (number)))))
-  (content))
 
 ==================
 Include Without A Name

test/corpus/with.txt

@@ -59,3 +59,51 @@ With Multiple Variables
               (identifier)))))
       (content)))
   (content))
+
+==================
+With A Binding Twice
+:error
+==================
+
+{% with a=1 a=2 %}x{% endwith %}
+
+---
+
+
+==================
+With A Binding Repeated Later
+:error
+==================
+
+{% with a=1 b=2 a=3 %}x{% endwith %}
+
+---
+
+
+==================
+With Repeating A Binding Of The Tag Before It
+==================
+
+{% with a=1 %}x{% endwith %}{% with a=2 %}y{% endwith %}
+
+---
+
+(template
+  (content)
+  (with_group
+    variable: (identifier)
+    (filtered_value
+      (value
+        (literal
+          (number))))
+    (template
+      (content)))
+  (with_group
+    variable: (identifier)
+    (filtered_value
+      (value
+        (literal
+          (number))))
+    (template
+      (content)))
+  (content))