Demodocs: move text from index to demo

Author: Blendify

demo_docs/source/demo.rst

@@ -53,6 +53,25 @@ should    be grouped    in pairs).``
 
 If the ``--pep-references`` option was supplied, there should be a live link to PEP 258 here.
 
+Maaaaath!
+=========
+
+This is a test. Here is an equation:
+:math:`X_{0:5} = (X_0, X_1, X_2, X_3, X_4)`.
+Here is another:
+
+.. math::
+    :label: This is a label
+
+    \nabla^2 f =
+    \frac{1}{r^2} \frac{\partial}{\partial r}
+    \left( r^2 \frac{\partial f}{\partial r} \right) +
+    \frac{1}{r^2 \sin \theta} \frac{\partial f}{\partial \theta}
+    \left( \sin \theta \, \frac{\partial f}{\partial \theta} \right) +
+    \frac{1}{r^2 \sin^2\theta} \frac{\partial^2 f}{\partial \phi^2}
+
+You can add a link to equations like the one above :eq:`This is a label` by using ``:eq:``.
+
 Meta
 ====
 
@@ -484,3 +503,8 @@ An inline image (|example|) example:
 .. |EXAMPLE| image:: static/yi_jing_01_chien.jpg
 
 (Substitution definitions are not visible in the HTML source.)
+
+Download Links
+==============
+
+:download:`This long long long long long long long long long long long long long long long download link should be blue, normal weight text with a leading icon, and should wrap white-spaces <static/yi_jing_01_chien.jpg>`

demo_docs/source/index.rst

@@ -32,25 +32,6 @@ Contents
 
 You can also read the :ref:`genindex`
 
-Maaaaath!
-=========
-
-This is a test. Here is an equation:
-:math:`X_{0:5} = (X_0, X_1, X_2, X_3, X_4)`.
-Here is another:
-
-.. math::
-    :label: This is a label
-
-    \nabla^2 f =
-    \frac{1}{r^2} \frac{\partial}{\partial r}
-    \left( r^2 \frac{\partial f}{\partial r} \right) +
-    \frac{1}{r^2 \sin \theta} \frac{\partial f}{\partial \theta}
-    \left( \sin \theta \, \frac{\partial f}{\partial \theta} \right) +
-    \frac{1}{r^2 \sin^2\theta} \frac{\partial^2 f}{\partial \phi^2}
-
-You can add a link to equations like the one above :eq:`This is a label` by using ``:eq:``.
-
 Optional parameter args
 =======================
 
@@ -107,8 +88,3 @@ Data
     Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce congue elit eu hendrerit mattis.
 
 Some data link :data:`Data_item_1`.
-
-Download links
-==============
-
-:download:`This long long long long long long long long long long long long long long long download link should be blue, normal weight text with a leading icon, and should wrap white-spaces <static/yi_jing_01_chien.jpg>`