Issue #2157945 by mondrake, andypost, kim.pepper, Bhanu951, alexpott, martin107, plach, ankithashetty, dawehner, karishmaamin, voleger, jhedstrom, jofitz, kostyashupenko, shashikant_chauhan, longwave, zeeshan_khan, claudiu.cristea, mstrelan, Berdir: Deprecate format_size() and use Drupal\Core\StringTranslation\ByteSizeMarkup instead