Update lookup.rst (#72831)

##### SUMMARY
Set correct indentation.


##### ISSUE TYPE
- Docs Pull Request

+label: docsite_pr

docs/docsite/rst/plugins/lookup.rst

@@ -36,13 +36,13 @@ You can use lookup plugins anywhere you can use templating in Ansible: in a play
 .. code-block:: YAML+Jinja
 
   vars:
-    file_contents: "{{lookup('file', 'path/to/file.txt')}}"
+    file_contents: "{{ lookup('file', 'path/to/file.txt') }}"
 
 Lookups are an integral part of loops. Wherever you see ``with_``, the part after the underscore is the name of a lookup. For this reason, most lookups output lists and take lists as input; for example, ``with_items`` uses the :ref:`items <items_lookup>` lookup::
 
   tasks:
     - name: count to 3
-      debug: msg={{item}}
+      debug: msg={{ item }}
       with_items: [1, 2, 3]
 
 You can combine lookups with :ref:`filters <playbooks_filters>`, :ref:`tests <playbooks_tests>` and even each other to do some complex data generation and manipulation. For example::
@@ -51,8 +51,8 @@ You can combine lookups with :ref:`filters <playbooks_filters>`, :ref:`tests <pl
     - name: valid but useless and over complicated chained lookups and filters
       debug: msg="find the answer here:\n{{ lookup('url', 'https://google.com/search/?q=' + item|urlencode)|join(' ') }}"
       with_nested:
-        - "{{lookup('consul_kv', 'bcs/' + lookup('file', '/the/question') + ', host=localhost, port=2000')|shuffle}}"
-        - "{{lookup('sequence', 'end=42 start=2 step=2')|map('log', 4)|list)}}"
+        - "{{ lookup('consul_kv', 'bcs/' + lookup('file', '/the/question') + ', host=localhost, port=2000')|shuffle }}"
+        - "{{ lookup('sequence', 'end=42 start=2 step=2')|map('log', 4)|list) }}"
         - ['a', 'c', 'd', 'c']
 
 .. versionadded:: 2.6