Minor fixes to Developer Docs (#28302)

* Grammar and formatting corrections

Indent JSON code example.
Double backticks for inline code examples.

* Remove trailing spaces

* CI fixes

docs/docsite/rst/dev_guide/developing_modules_documenting.rst

@@ -96,7 +96,7 @@ Version 1.1 of the metadata
 +++++++++++++++++++++++++++
 
 Structure
-`````````
+^^^^^^^^^
 
 .. code-block:: python
 
@@ -107,7 +107,7 @@ Structure
   }
 
 Fields
-``````
+^^^^^^
 
 :metadata_version: An “X.Y” formatted string. X and Y are integers which
    define the metadata format version. Modules shipped with Ansible are
@@ -406,6 +406,8 @@ accepts a comma-separated list of module names. To skip building
 documentation for all modules, specify a non-existent module name, for example:
 ``MODULES=none make webdocs``.
 
+You may also build a single page of the entire docsite. From ``ansible/docs/docsite`` run ``make htmlsingle rst=[relative path to the .rst file]``, for example: ``make htmlsingle rst=dev_guide/developing_modules_documenting.rst``
+
 To test your documentation against your ``argument_spec`` you can use ``validate-modules``. Note that this option isn't currently enabled in Shippable due to the time it takes to run.
 
 .. code-block:: bash

docs/docsite/rst/dev_guide/developing_modules_general.rst

@@ -51,7 +51,9 @@ working on a whole new file. Here is an example:
 -  Navigate to the directory that you want to develop your new module
    in. E.g. ``$ cd lib/ansible/modules/cloud/azure/``
 -  Create your new module file: ``$ touch my_new_test_module.py``
--  Paste this simple into the new module file: (explanation in comments)::
+-  Paste this example code into the new module file: (explanation in comments)
+
+.. code:: python
 
     #!/usr/bin/python
 
@@ -187,7 +189,7 @@ that can run locally.
 -  Create an arguments file in ``/tmp/args.json`` with the following
    content: (explanation below)
 
-   .. code:: json
+.. code:: json
 
     {
         "ANSIBLE_MODULE_ARGS": {
@@ -205,7 +207,7 @@ that can run locally.
 This should be working output that resembles something like the
 following:
 
-::
+.. code:: json
 
     {"changed": true, "state": {"original_message": "hello", "new_message": "goodbye"}, "invocation": {"module_args": {"name": "hello", "new": true}}}
 
@@ -221,7 +223,6 @@ Ansible playbook.
 -  Create a playbook in any directory: ``$ touch testmod.yml``
 -  Add the following to the new playbook file::
 
-    ---
     - name: test my new module
       connection: local
       hosts: localhost
@@ -242,7 +243,7 @@ Debugging (local)
 
 If you want to break into a module and step through with the debugger, locally running the module you can do:
 
-- Set a breakpoint in the module: `import pdb; pdb.set_trace()`
+- Set a breakpoint in the module: ``import pdb; pdb.set_trace()``
 - Run the module on the local machine: ``$ python -m pdb ./my_new_test_module.py ./args.json``
 
 Debugging (remote)