Fix logic line break

Co-authored-by: Elliott Sales de Andrade <[email protected]>

Author: dstansby

lib/matplotlib/axes/_base.py

@@ -2581,8 +2581,8 @@ def _process_unit_info(self, datasets=None, kwargs=None, *, convert=True):
                 raise ValueError(f"Invalid axis name: {axis_name!r}") from None
             # Update from data if axis is already set but no unit is set yet.
             if (axis is not None and
-                    data is not None and not
-                    axis._have_units_and_converter()):
+                    data is not None and
+                    not axis._have_units_and_converter()):
                 axis.update_units(data)
         for axis_name, axis in axis_map.items():
             # Return if no axis is set.