Handle void tags at EOF

corpus/main.txt

@@ -77,6 +77,18 @@ Void tags
         (attribute (attribute_name) (attribute_value))))
     (end_tag (tag_name))))
 
+==================================
+Void tags at EOF
+==================================
+<img src="something.png">
+---
+
+(fragment
+  (element
+    (start_tag
+      (tag_name)
+      (attribute (attribute_name) (quoted_attribute_value (attribute_value))))))
+
 ==================================
 Custom tags
 ==================================

src/scanner.cc

@@ -223,6 +223,12 @@ struct Scanner {
         }
         break;
 
+      case '\0':
+        if (valid_symbols[IMPLICIT_END_TAG]) {
+          return scan_implicit_end_tag(lexer);
+        }
+        break;
+
       case '/':
         if (valid_symbols[SELF_CLOSING_TAG_DELIMITER]) {
           return scan_self_closing_tag_delimiter(lexer);