Update playbooks_roles.rst

Typo fix in playbooks_intro.rst

Ignore compiled Python for documentation.

Update developing_modules.rst

Fix the synopsis in ansible-pull man page.

Small punctuation/grammar fix.

When running `ansible-doc --list` a lot of errors are
generated when `ansible-doc` tries to find documentation
strings in `.pyc` files.

Fixes #9316

Fixes #9399

This reverts commit a6029264.

Fixes #9400

Update intro_installation.rst

Add host to polling message

* moved old unittests for vault over to the new codebase
* reverted YAML error helpers and reverted the load() function
  in parsing/__init__.py, pending a rewrite of a new YAML loader
  class of some kind to encapsulate all of that
* fixed an error in in the module args parser regarding the shell/
  command argument parsing, where some additional arguments were
  being lost

Corrected casing of Jinja2 in pip dependencies.

Debian/Ubuntu doesn't have group nobody so remove the group portion of the new template tests as owner and mode will exercise the problematic code path

integration tests

Fixes #9350

Change "usuable" to "usable".

Fix typo