DOC fix truncated documentation for Series.unstack(), Series. (#31260)

Author: anjalis912

pandas/core/generic.py

@@ -7498,7 +7498,7 @@ def at_time(
         self: FrameOrSeries, time, asof: bool_t = False, axis=None
     ) -> FrameOrSeries:
         """
-        Select values at particular time of day (e.g. 9:30AM).
+        Select values at particular time of day (e.g., 9:30AM).
 
         Parameters
         ----------

pandas/core/series.py

@@ -3484,7 +3484,7 @@ def explode(self) -> "Series":
 
     def unstack(self, level=-1, fill_value=None):
         """
-        Unstack, a.k.a. pivot, Series with MultiIndex to produce DataFrame.
+        Unstack, also known as pivot, Series with MultiIndex to produce DataFrame.
         The level involved will automatically get sorted.
 
         Parameters