DOC: sync docstrings with NaT

AlexKirko · AlexKirko · commit e511f6052a35 · 2020-01-20T19:53:38.000+03:00
diff --git a/pandas/_libs/tslibs/nattype.pyx b/pandas/_libs/tslibs/nattype.pyx
@@ -278,7 +278,7 @@ cdef class _NaT(datetime):
 
     def total_seconds(self):
         """
-        Total duration of timedelta in seconds (to ns precision).
+        Total duration of timedelta in seconds (to microsecond precision).
         """
         # GH#10939
         return np.nan
