update doctest

Author: jbrockmendel

pandas/core/indexes/timedeltas.py

@@ -332,8 +332,9 @@ def timedelta_range(
     **Specify a unit**
 
     >>> pd.timedelta_range("1 Day", periods=3, freq="100000D", unit="s")
-    TimedeltaIndex(['1 days', '100001 days', '200001 days'], dtype='timedelta64[s]', freq='2400000H')
-    """  # noqa: E501
+    TimedeltaIndex(['1 days', '100001 days', '200001 days'],
+                   dtype='timedelta64[s]', freq='2400000h')
+    """
     if freq is None and com.any_none(periods, start, end):
         freq = "24h"