Test the extract filter without the map filter.

map + extract is the usual way to use it but map isn't available on
older versions of jinja2 that we still work with.  Test extract even on
those versions.

test/integration/targets/filters/tasks/main.yml

@@ -95,6 +95,13 @@
   assert:
     that: "{{_.failed}}"
 
+- name: Test extract
+  assert:
+    that:
+        - '"c" == 2 | extract(["a", "b", "c"])'
+        - '"b" == 1 | extract(["a", "b", "c"])'
+        - '"a" == 0 | extract(["a", "b", "c"])'
+
 - name: Container lookups with extract
   assert:
     that: