Correcting the pipeline object definition (#34899)

* Correcting the pipeline object definition

* Corrected the definition

* lint correction

* Corrected formatting

Author: TanuSharma2511

sdks/python/apache_beam/pipeline.py

@@ -115,13 +115,12 @@
 
 
 class Pipeline(HasDisplayData):
-  """A pipeline object that manages a DAG of
-  :class:`~apache_beam.pvalue.PValue` s and their
-  :class:`~apache_beam.transforms.ptransform.PTransform` s.
+  """A pipeline object that manages a DAG of 
+  :class:`~apache_beam.transforms.ptransform.PTransform` s 
+  and their :class:`~apache_beam.pvalue.PValue` s.
 
-  Conceptually the :class:`~apache_beam.pvalue.PValue` s are the DAG's nodes and
-  the :class:`~apache_beam.transforms.ptransform.PTransform` s computing
-  the :class:`~apache_beam.pvalue.PValue` s are the edges.
+  Conceptually the :class:`~apache_beam.transforms.ptransform.PTransform` s are 
+  the DAG's nodes and the :class:`~apache_beam.pvalue.PValue` s are the edges.
 
   All the transforms applied to the pipeline must have distinct full labels.
   If same transform instance needs to be applied then the right shift operator