add tests for code blocks

tests/test.md

@@ -13,3 +13,24 @@ This is `$E = mc^2$` inline math.
 This first math `$x^2$` in this line will render. This one `$z^3$` should as well.
 
 Also within parentheses (`$x^2$`) and (`$z^3$`).
+
+```bash
+for (( counter=10; counter>0; counter-- ))
+do
+echo -n "$counter "
+done
+printf "\n"
+```
+
+Let's snake things up:
+
+```python
+def f(x, y):
+    return x + y + 1
+```
+
+And again:
+```python
+def f(x, y):
+    return x + y + 1
+```

tests/test.rst

@@ -17,3 +17,25 @@ This is :math:`E = mc^2` inline math.
 This first math :math:`x^2` in this line will render. This one :math:`z^3` should as well.
 
 Also within parentheses (:math:`x^2`) and (:math:`z^3`).
+
+.. code-block:: bash
+
+   for (( counter=10; counter>0; counter-- ))
+   do
+   echo -n "$counter "
+   done
+   printf "\n"
+
+Let's snake things up:
+
+.. code-block:: python
+
+   def f(x, y):
+       return x + y + 1
+
+And again:
+
+.. code-block:: python
+
+   def f(x, y):
+       return x + y + 1