Issue 3416: Format fix basic-reader-and-writer.md (#3438)
Issue 3416: Format fix basic-reader-and-writer.md (#3438)

Fix file was not rendered properly in Pravega.io, so that formats display correctly on the website.

Signed-off-by: Aparna <c1277982912e52496fa0358b88098af868f59fde@emc.com>
pravega/pravega,pravega/pravega,pravega/pravega