Docs: Replace links to '/stable/' with '/latest/'. (#5901)

* Replace links to '/stable/' with '/latest/'.

* DRY out duplicated 'README.rst' vs. 'docs/index.rst'.

* Include websecurityscanner in docs.

Toward #5894.

packages/google-cloud-texttospeech/README.rst

@@ -9,8 +9,8 @@ models.
 
 .. _Alpha: https://github.com/GoogleCloudPlatform/google-cloud-python/blob/master/README.rst
 .. _Cloud Text-to-Speech API: https://cloud.google.com/texttospeech
-.. _Client Library Documentation: https://google-cloud-python.readthedocs.io/en/latest/texttospeech/index.html
-.. _Product Documentation:  https://cloud.google.com/texttospeech
+.. _Client Library Documentation: https://googlecloudplatform.github.io/google-cloud-python/latest/texttospeech/api.html
+.. _Product Documentation: https://cloud.google.com/texttospeech
 
 Quick Start
 -----------
@@ -25,7 +25,7 @@ In order to use this library, you first need to go through the following steps:
 .. _Select or create a Cloud Platform project.: https://console.cloud.google.com/project
 .. _Enable billing for your project.: https://cloud.google.com/billing/docs/how-to/modify-project#enable_billing_for_a_project
 .. _Enable the Cloud Text-to-Speech API.:  https://cloud.google.com/texttospeech
-.. _Setup Authentication.: https://googlecloudplatform.github.io/google-cloud-python/stable/core/auth.html
+.. _Setup Authentication.: https://googlecloudplatform.github.io/google-cloud-python/latest/core/auth.html
 
 Installation
 ~~~~~~~~~~~~

packages/google-cloud-texttospeech/docs/index.rst

@@ -1,79 +1,4 @@
-Python Client for Cloud Text-to-Speech API (`Alpha`_)
-=====================================================
-
-`Cloud Text-to-Speech API`_: Synthesizes natural-sounding speech by applying powerful neural network
-models.
-
-- `Client Library Documentation`_
-- `Product Documentation`_
-
-.. _Alpha: https://github.com/GoogleCloudPlatform/google-cloud-python/blob/master/README.rst
-.. _Cloud Text-to-Speech API: https://cloud.google.com/texttospeech
-.. _Client Library Documentation: https://googlecloudplatform.github.io/google-cloud-python/stable/texttospeech/api.html
-.. _Product Documentation: https://cloud.google.com/texttospeech
-
-Quick Start
------------
-
-In order to use this library, you first need to go through the following steps:
-
-1. `Select or create a Cloud Platform project.`_
-2. `Enable billing for your project.`_
-3. `Enable the Cloud Text-to-Speech API.`_
-4. `Setup Authentication.`_
-
-.. _Select or create a Cloud Platform project.: https://console.cloud.google.com/project
-.. _Enable billing for your project.: https://cloud.google.com/billing/docs/how-to/modify-project#enable_billing_for_a_project
-.. _Enable the Cloud Text-to-Speech API.:  https://cloud.google.com/texttospeech
-.. _Setup Authentication.: https://googlecloudplatform.github.io/google-cloud-python/stable/core/auth.html
-
-Installation
-~~~~~~~~~~~~
-
-Install this library in a `virtualenv`_ using pip. `virtualenv`_ is a tool to
-create isolated Python environments. The basic problem it addresses is one of
-dependencies and versions, and indirectly permissions.
-
-With `virtualenv`_, it's possible to install this library without needing system
-install permissions, and without clashing with the installed system
-dependencies.
-
-.. _`virtualenv`: https://virtualenv.pypa.io/en/latest/
-
-
-Mac/Linux
-^^^^^^^^^
-
-.. code-block:: console
-
-    pip install virtualenv
-    virtualenv <your-env>
-    source <your-env>/bin/activate
-    <your-env>/bin/pip install google-cloud-texttospeech
-
-
-Windows
-^^^^^^^
-
-.. code-block:: console
-
-    pip install virtualenv
-    virtualenv <your-env>
-    <your-env>\Scripts\activate
-    <your-env>\Scripts\pip.exe install google-cloud-texttospeech
-
-Next Steps
-~~~~~~~~~~
-
--  Read the `Client Library Documentation`_ for Cloud Text-to-Speech API
-   API to see other available methods on the client.
--  Read the `Cloud Text-to-Speech API Product documentation`_ to learn
-   more about the product and see How-to Guides.
--  View this `repository’s main README`_ to see the full list of Cloud
-   APIs that we cover.
-
-.. _Cloud Text-to-Speech API Product documentation:  https://cloud.google.com/texttospeech
-.. _repository’s main README: https://github.com/GoogleCloudPlatform/google-cloud-python/blob/master/README.rst
+.. include:: /../texttospeech/README.rst
 
 Api Reference
 -------------