Remove unnecessary indentation from code examples

docs/reference/contrib/typed_table_block.md

@@ -23,11 +23,11 @@ Usage
 `TypedTableBlock` can be imported from the module `wagtail.contrib.typed_table_block.blocks` and used within a StreamField definition. Just like `StructBlock` and `StreamBlock`, it accepts a list of `(name, block_type)` tuples to use as child blocks:
 
 ```python
-  from wagtail.contrib.typed_table_block.blocks import TypedTableBlock
-  from wagtail.core import blocks
-  from wagtail.images.blocks import ImageChooserBlock
+from wagtail.contrib.typed_table_block.blocks import TypedTableBlock
+from wagtail.core import blocks
+from wagtail.images.blocks import ImageChooserBlock
 
-  class DemoStreamBlock(blocks.StreamBlock):
+class DemoStreamBlock(blocks.StreamBlock):
     title = blocks.CharBlock()
     paragraph = blocks.RichTextBlock()
     table = TableBlock([
@@ -60,21 +60,21 @@ To keep the UI as simple as possible for authors, it's generally recommended to
 On your page template, the `{% include_block %}` tag (called on either the individual block, or the StreamField value as a whole) will render any typed table blocks as an HTML `<table>` element.
 
 ```html+django
-    {% load wagtailcore_tags %}
+{% load wagtailcore_tags %}
 
-    {% include_block page.body %}
+{% include_block page.body %}
 ```
 
 Or:
 
 ```html+django
-    {% load wagtailcore_tags %}
+{% load wagtailcore_tags %}
 
-    {% for block in page.body %}
+{% for block in page.body %}
     {% if block.block_type == 'table' %}
         {% include_block block %}
     {% else %}
         {# rendering for other block types #}
     {% endif %}
-    {% endfor %}
+{% endfor %}
 ```