[tests] [unit] Remove the newline characters in read_write_unit_test
[tests] [unit] Remove the newline characters in read_write_unit_test

fhijaz/Graphite,victorisildur/Graphite,victorisildur/Graphite,nkawahara/Graphite,mit-carbon/Graphite,8l/Graphite,fhijaz/Graphite,8l/Graphite,fhijaz/Graphite,mit-carbon/Graphite,nkawahara/Graphite,nkawahara/Graphite,8l/Graphite,victorisildur/Graphite,nkawahara/Graphite,victorisildur/Graphite,fhijaz/Graphite,mit-carbon/Graphite,mit-carbon/Graphite,8l/Graphite