[Data] Fix read_parquet docstring (ray-project#39796)

Some code text isn't rendering because there are missing newlines.

Signed-off-by: Balaji Veeramani <[email protected]>

python/ray/data/read_api.py

@@ -584,15 +584,17 @@ def read_parquet(
  petal.width double
  variety string
 
-
  Read a directory in remote storage.
+
  >>> ds = ray.data.read_parquet("s3:https://anonymous@ray-example-data/iris-parquet/")
 
  Read multiple local files.
+
  >>> ray.data.read_parquet(
  ... ["local:https:///path/to/file1", "local:https:///path/to/file2"]) # doctest: +SKIP
 
  Specify a schema for the parquet file.
+
  >>> import pyarrow as pa
  >>> fields = [("sepal.length", pa.float32()),
  ... ("sepal.width", pa.float32()),
@@ -610,7 +612,6 @@ def read_parquet(
  petal.width float
  variety string
 
-
  The Parquet reader also supports projection and filter pushdown, allowing column
  selection and row filtering to be pushed down to the file scan.