Format a string with '{0}','{1}'...
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/453846/1131145/string%20format.js
Format a string with '{0}','{1}'...
e.g.
'1+1 = {0}'.format(1 + 1);