Fix docs

Author: nuno-faria

docs/source/user-guide/upgrade-guides.rst

@@ -21,20 +21,23 @@ Upgrade Guides
 DataFusion 53.0.0
 -----------------
 
-This version includes an upgraded version of `pyo3`, which changed the way to extract an FFI object.
-Example:
+This version includes an upgraded version of ``pyo3``, which changed the way to extract an FFI
+object. Example:
 
 Before:
+
 .. code-block:: rust
-        let codec = unsafe { capsule.reference::<FFI_LogicalExtensionCodec>() };
+
+    let codec = unsafe { capsule.reference::<FFI_LogicalExtensionCodec>() };
 
 Now:
+
 .. code-block:: rust
-        let data: NonNull<FFI_LogicalExtensionCodec> = capsule
-            .pointer_checked(Some(c_str!("datafusion_logical_extension_codec")))?
-            .cast();
-        let codec = unsafe { data.as_ref() };
 
+    let data: NonNull<FFI_LogicalExtensionCodec> = capsule
+        .pointer_checked(Some(c_str!("datafusion_logical_extension_codec")))?
+        .cast();
+    let codec = unsafe { data.as_ref() };
 
 DataFusion 52.0.0
 -----------------