Fix the format issues in pip package descriptions. (#2140)

* Fix the format issues in pip pkg descriptions.

* Update descriptions according to the comments.

Author: brightcoder01

setup_client.py

@@ -21,9 +21,9 @@
     version="develop",
     description="The client command line tool for ElasticDL.",
     long_description="ElasticDL Client is the client command line tool for"
-    "ElasticDL. It's convenient with it to build and push Docker images for"
-    "a distributed ElasticDL job. And then we can use it to submit a train, "
-    "evaluate or predict job to a Kubernetes cluster.",
+    " ElasticDL. Users can use it to submit distributed ElasticDL jobs to"
+    " a Kubernetes cluster. It also provides an easy way to build and push"
+    " Docker images for distributed ElasticDL jobs.",
     long_description_content_type="text/markdown",
     author="Ant Financial",
     url="https://elasticdl.org",

setup_preprocessing.py

@@ -27,7 +27,7 @@
     long_description="This is an extension of the native Keras Preprocessing"
     " Layers and Feature Column API from TensorFlow. We can develop our model"
     " using the native high-level API from TensorFlow and our library."
-    "We can train this model using native TensorFlow or ElasticDL.",
+    " We can train this model using native TensorFlow or ElasticDL.",
     long_description_content_type="text/markdown",
     author="Ant Financial",
     url="https://elasticdl.org",