Update layouts.rst
Fix quotation issue that causes a `SyntaxError`:
`'Button's content'` -> `"Button's content"`
@@ -245,7 +245,7 @@ These ones live under module ``crispy_forms.bootstrap``.
- **StrictButton**: It renders a button using ``<button>`` html, not ``input``. By default ``type`` is set to ``button`` and ``class`` is set to ``btn``::
- StrictButton('Button's content', name="go", value="go", css_class="extra")
+ StrictButton("Button's content", name="go", value="go", css_class="extra")
StrictButton('Success', css_class="btn-success")
.. image:: images/strict_button.png
