DOC: Fix GH24143, updated generic.py

Author: aqurilla

pandas/core/generic.py

@@ -10034,9 +10034,7 @@ def nanptp(values, axis=0, skipna=True):
             cls, 'ptp', name, name2, axis_descr,
             """Returns the difference between the maximum value and the
             minimum value in the object. This is the equivalent of the
-            ``numpy.ndarray`` method ``ptp``.
-
-            .. deprecated:: 0.24.0
+            ``numpy.ndarray`` method ``ptp``.\n\n.. deprecated:: 0.24.0
                 Use numpy.ptp instead""",
             nanptp)