fixed argument name in Axis.split()

Author: alixdamman

larray/core/axis.py

@@ -333,7 +333,7 @@ def split(self, sep='_', names=None, regex=None, return_labels=False):
             Names of resulting axes. Defaults to None.
         regex : str, optional
             Use regex instead of delimiter to split labels. Defaults to None.
-        labels : bool, optional
+        return_labels : bool, optional
             Whether or not split labels must be returned (as a tuple of tuples). These labels are suitable for indexing
             via array.points[labels]. Defaults to False.