Consistent indentation

This was done by executing this command:

```
find src -type f -name '*.rst' -exec sed -Ei 's/^  :/    :/g' {} \;
```

src/archive/deploying-php-ansible-ansistrano/sections/ansistrano.rst

@@ -7,7 +7,7 @@ Better deployments with Ansistrano
 .. page:: standardPage
 
 .. image:: images/ansistrano.png
-  :width: 24cm
+    :width: 24cm
 
 .. raw:: pdf
 
@@ -197,7 +197,7 @@ Build Hooks
 .. page:: imagePage
 
 .. image:: images/ansistrano-flow.png
-  :width: 18cm
+    :width: 18cm
 
 .. raw:: pdf
 

src/archive/deploying-php-ansible-ansistrano/sections/basic-deployment.rst

@@ -48,7 +48,7 @@ Basic deployment
 .. page:: standardPage
 
 .. image:: images/after-deploy-1.png
-  :width: 24cm
+    :width: 24cm
 
 .. page:: standardPage
 

src/archive/deploying-php-ansible-ansistrano/sections/building-a-lamp-stack.rst

@@ -180,7 +180,7 @@ requirements.yml
     PageBreak
 
 .. image:: images/after-provision-1.png
-  :width: 24cm
+    :width: 24cm
 
 .. raw:: pdf
 
@@ -191,7 +191,7 @@ requirements.yml
     PageBreak
 
 .. image:: images/after-provision-2.png
-  :width: 24cm
+    :width: 24cm
 
 .. raw:: pdf
 

src/archive/deploying-php-ansible-ansistrano/slides-short.rst

@@ -17,7 +17,7 @@ Oliver Davies, Inviqa
 .. page:: imagePage
 
 .. image:: images/techs.png
-  :width: 14cm
+    :width: 14cm
 
 .. include:: sections/building-a-lamp-stack.rst
 .. include:: sections/basic-deployment.rst

src/building-build-configs/sections/intro.rst

@@ -39,7 +39,7 @@ How Does it Work?
 =================
 
 .. image:: diagram.png
-  :width: 18cm
+    :width: 18cm
 
 .. raw:: pdf
 

src/building-build-configs/sections/templates.rst

@@ -6,7 +6,7 @@ Dockerfile.twig
 ===============
 
 .. code-block:: twig
-  :linenos:
+    :linenos:
 
     FROM php:{{ php.version }} AS base
 

src/building-presenting-slide-decks-rst2pdf/slides.rst

@@ -125,7 +125,7 @@ Re-compiling when something changes.
 |
 
 .. code-block:: bash
-  :include: code/watching.txt
+    :include: code/watching.txt
 
 Presenting
 ==========

src/php-south-wales-intro-slides/2021-01/slides.rst

@@ -68,14 +68,14 @@ Join us in ``#website-improve``
 .. page:: imagePage
 
 .. image:: images/dpcon-cfp.png
-  :width: 18cm
+    :width: 18cm
 
 .. image:: images/symfonylive-online-cfp.png
-  :width: 18cm
+    :width: 18cm
 
 .. raw:: pdf
 
     PageBreak
 
 .. image:: images/deploy-friday-composer.png
-  :width: 20cm
+    :width: 20cm

src/test-driven-drupal/demo.rst

@@ -76,10 +76,10 @@ Tasks
 .. Adding the first test.
 
 .. code-block:: php
-  :include: code/3.txt
-  :linenos:
-  :startinline: true
-  :end-before: // end test
+    :include: code/3.txt
+    :linenos:
+    :startinline: true
+    :end-before: // end test
 
 .. raw:: pdf
 
@@ -150,21 +150,21 @@ Tasks
     PageBreak
 
 .. code-block:: yaml
-  :include: code/3.txt
-  :linenos:
-  :start-after: // start routing
-  :end-before: // end routing
+    :include: code/3.txt
+    :linenos:
+    :start-after: // start routing
+    :end-before: // end routing
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: yaml
-  :include: code/3.txt
-  :linenos:
-  :start-after: // start routing
-  :end-before: // end routing
-  :hl_lines: 4,6
+    :include: code/3.txt
+    :linenos:
+    :start-after: // start routing
+    :end-before: // end routing
+    :hl_lines: 4,6
 
 .. raw:: pdf
 
@@ -175,11 +175,11 @@ Tasks
     PageBreak
 
 .. code-block:: php
-  :include: code/3.txt
-  :startinline: true
-  :start-after: // start output
-  :end-before: // end output
-  :hl_lines: 7,8,9
+    :include: code/3.txt
+    :startinline: true
+    :start-after: // start output
+    :end-before: // end output
+    :hl_lines: 7,8,9
 
 .. raw:: pdf
 
@@ -190,18 +190,18 @@ Tasks
     PageBreak
 
 .. code-block:: php
-  :include: code/4.txt
-  :linenos:
-  :startinline: true
-  :end-before: // output
+    :include: code/4.txt
+    :linenos:
+    :startinline: true
+    :end-before: // output
 
 |
 
 .. code-block:: plain
-  :include: code/4.txt
-  :startinline: true
-  :start-after: // output
-  :end-before: // end output
+    :include: code/4.txt
+    :startinline: true
+    :start-after: // output
+    :end-before: // end output
 
 .. raw:: pdf
 
@@ -211,17 +211,17 @@ Tasks
 .. Enable the node module.
 
 .. code-block:: php
-  :include: code/5.txt
-  :linenos:
-  :startinline: true
-  :end-before: // end code
+    :include: code/5.txt
+    :linenos:
+    :startinline: true
+    :end-before: // end code
 
 |
 
 .. code-block:: plain
-  :include: code/5.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/5.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
@@ -232,67 +232,67 @@ Tasks
 .. Create the Controller.
 
 .. code-block:: php
-  :include: code/6.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
+    :include: code/6.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
 
 .. raw:: pdf
 
    PageBreak
 
 .. code-block:: php
-  :include: code/6.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 1,2,3
+    :include: code/6.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 1,2,3
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/6.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 7,13
+    :include: code/6.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 7,13
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/6.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 9,10,11
+    :include: code/6.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 9,10,11
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: plain
-  :include: code/6.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/6.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/7.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
+    :include: code/7.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
 
 .. raw:: pdf
 
@@ -325,241 +325,241 @@ Tasks
     PageBreak
 
 .. code-block:: plain
-  :include: code/7.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/7.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/7.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 3,7
+    :include: code/7.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 3,7
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/7.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 10,11,12
+    :include: code/7.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 10,11,12
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: plain
-  :include: code/7.txt
-  :start-after: // start output2
-  :end-before: // end output2
+    :include: code/7.txt
+    :start-after: // start output2
+    :end-before: // end output2
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/8.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
+    :include: code/8.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/8.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 1,2,3,4,5,6,7,15
+    :include: code/8.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 1,2,3,4,5,6,7,15
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/8.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 9,10,14
+    :include: code/8.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 9,10,14
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/8.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 11
+    :include: code/8.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 11
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/8.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 13
+    :include: code/8.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 13
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/8.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/8.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. code-block:: php
-  :include: code/8.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/8.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/9.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
+    :include: code/9.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
 
 |
 
 .. code-block:: yaml
-  :include: code/9.txt
-  :linenos:
-  :start-after: // start services
-  :end-before: // end services
+    :include: code/9.txt
+    :linenos:
+    :start-after: // start services
+    :end-before: // end services
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: yaml
-  :include: code/9.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/9.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/10.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 5,6,7
+    :include: code/10.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 5,6,7
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: plain
-  :include: code/10.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/10.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/11.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code 1
-  :end-before: // end code 1
+    :include: code/11.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code 1
+    :end-before: // end code 1
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/11.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code 1
-  :end-before: // end code 1
-  :hl_lines: 10,11,12
+    :include: code/11.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code 1
+    :end-before: // end code 1
+    :hl_lines: 10,11,12
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/11.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code 1
-  :end-before: // end code 1
-  :hl_lines: 8,13
+    :include: code/11.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code 1
+    :end-before: // end code 1
+    :hl_lines: 8,13
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/11.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code 2
-  :end-before: // end code 2
-  :hl_lines: 1,3
+    :include: code/11.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code 2
+    :end-before: // end code 2
+    :hl_lines: 1,3
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/11.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code 2
-  :end-before: // end code 2
-  :hl_lines: 2
+    :include: code/11.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code 2
+    :end-before: // end code 2
+    :hl_lines: 2
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: yaml
-  :include: code/12.txt
-  :linenos:
-  :start-after: // start services1
-  :end-before: // end services1
+    :include: code/12.txt
+    :linenos:
+    :start-after: // start services1
+    :end-before: // end services1
 
 |
 
 .. code-block:: yaml
-  :include: code/12.txt
-  :linenos:
-  :start-after: // start services2
-  :end-before: // end services2
+    :include: code/12.txt
+    :linenos:
+    :start-after: // start services2
+    :end-before: // end services2
 
 .. raw:: pdf
 
@@ -571,71 +571,71 @@ Tasks
     PageBreak
 
 .. code-block:: plain
-  :include: code/12.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/12.txt
+    :start-after: // start output
+    :end-before: // end output
 
 |
 
 .. code-block:: php
-  :include: code/13.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
+    :include: code/13.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: plain
-  :include: code/13.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/13.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/14.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
-  :hl_lines: 1
+    :include: code/14.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
+    :hl_lines: 1
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/14.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
-  :hl_lines: 5
+    :include: code/14.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
+    :hl_lines: 5
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: plain
-  :include: code/14.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/14.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/15.txt
-  :linenos:
-  :start-after: // start test
-  :end-before: // end test
-  :startinline: true
+    :include: code/15.txt
+    :linenos:
+    :start-after: // start test
+    :end-before: // end test
+    :startinline: true
 
 .. raw:: pdf
 
@@ -643,12 +643,12 @@ Tasks
    PageBreak
 
 .. code-block:: php
-  :include: code/15.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
-  :hl_lines: 1,2,3,4
+    :include: code/15.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
+    :hl_lines: 1,2,3,4
 
 .. raw:: pdf
 
@@ -656,24 +656,24 @@ Tasks
    PageBreak
 
 .. code-block:: php
-  :include: code/15.txt
-  :linenos:
-  :startinline: true
-  :end-before: // end test
-  :start-after: // start test
-  :hl_lines: 10,11
+    :include: code/15.txt
+    :linenos:
+    :startinline: true
+    :end-before: // end test
+    :start-after: // start test
+    :hl_lines: 10,11
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/15.txt
-  :startinline: true
-  :linenos:
-  :start-after: // start test
-  :end-before: // end test
-  :hl_lines: 13,14,15
+    :include: code/15.txt
+    :startinline: true
+    :linenos:
+    :start-after: // start test
+    :end-before: // end test
+    :hl_lines: 13,14,15
 
 .. raw:: pdf
 
@@ -683,47 +683,47 @@ Tasks
 .. Published or unpublished nodes.
 
 .. code-block:: php
-  :include: code/16.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
+    :include: code/16.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/16.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
-  :hl_lines: 2,4,6
+    :include: code/16.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
+    :hl_lines: 2,4,6
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/16.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
-  :hl_lines: 3,5
+    :include: code/16.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
+    :hl_lines: 3,5
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/16.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
-  :hl_lines: 12
+    :include: code/16.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
+    :hl_lines: 12
 
 .. raw:: pdf
 
@@ -731,27 +731,27 @@ Tasks
    PageBreak
 
 .. code-block:: plain
-  :include: code/16.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/16.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/17.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
+    :include: code/17.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
 
 |
 
 .. code-block:: plain
-  :include: code/17.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/17.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
@@ -760,79 +760,79 @@ Tasks
 .. Ensure articles are ordered correctly.
 
 .. code-block:: php
-  :include: code/18.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
+    :include: code/18.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/18.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
-  :hl_lines: 3,5,7,9,11
+    :include: code/18.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
+    :hl_lines: 3,5,7,9,11
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/18.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start test
-  :end-before: // end test
-  :hl_lines: 16
+    :include: code/18.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start test
+    :end-before: // end test
+    :hl_lines: 16
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: plain
-  :include: code/18.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/18.txt
+    :start-after: // start output
+    :end-before: // end output
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/19.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
+    :include: code/19.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/19.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 2,3,4
+    :include: code/19.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 2,3,4
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: php
-  :include: code/19.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 6,7
+    :include: code/19.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 6,7
 
 .. raw:: pdf
 
@@ -840,18 +840,18 @@ Tasks
    PageBreak
 
 .. code-block:: php
-  :include: code/19.txt
-  :linenos:
-  :startinline: true
-  :start-after: // start code
-  :end-before: // end code
-  :hl_lines: 9
+    :include: code/19.txt
+    :linenos:
+    :startinline: true
+    :start-after: // start code
+    :end-before: // end code
+    :hl_lines: 9
 
 .. raw:: pdf
 
     PageBreak
 
 .. code-block:: plain
-  :include: code/19.txt
-  :start-after: // start output
-  :end-before: // end output
+    :include: code/19.txt
+    :start-after: // start output
+    :end-before: // end output

src/test-driven-drupal/slides.rst

@@ -30,7 +30,7 @@ Software Developer, Consultant, open-source maintainer
 .. page:: imagePage
 
 .. image:: images/timmillwood-ono.png
-  :width: 22cm
+    :width: 22cm
 
 .. raw:: pdf
 
@@ -39,7 +39,7 @@ Software Developer, Consultant, open-source maintainer
 .. page:: imagePage
 
 .. image:: images/override-node-options-1.png
-  :width: 18cm
+    :width: 18cm
 
 .. raw:: pdf
 
@@ -50,12 +50,12 @@ Software Developer, Consultant, open-source maintainer
 |
 
 .. image:: images/override-node-options-2.png
-  :width: 22cm
+    :width: 22cm
 
 |
 
 .. image:: images/override-node-options-3.png
-  :width: 22cm
+    :width: 22cm
 
 .. raw:: pdf