ignore my previous comment. I think the following is what you need:

```
+++ b/doc/src/modules/solvers/diophantine.rst
@@ -84,7 +84,7 @@ First, let's import the highest API of the Diophantine module.
 Before we start solving the equations, we need to define the variables.

 >>> from sympy import symbols
->>> x, y, z = symbols("x, y, z", Integer=True)
+>>> x, y, z = symbols("x, y, z", integer=True)
```