ignore some python code in doc strings

src/objectprotocol.rs

@@ -41,7 +41,7 @@ pub trait ObjectProtocol {
     /// On Python 2, this is equivalent to the Python expression 'cmp(self, other)'.
     ///
     /// On Python 3, this is equivalent to:
-    /// ```
+    /// ```python,ignore
     /// if self == other:
     ///     return Equal
     /// elif a < b:

src/typeob.rs

@@ -102,7 +102,7 @@ impl<'a, T: ?Sized> PyTypeInfo for &'a T where T: PyTypeInfo {
 /// Calling of `__new__` method of base class is developer's responsibility.
 ///
 /// Example of custom class implementation with `__new__` method:
-/// ```rust
+/// ```rust,ignore
 /// #[py::class]
 /// struct MyClass {
 ///    token: PyToken