[docs] [issue19824] string.Template: Add PHP-style variable expansion example

anatoly techtonik added the comment: There is nothing to add to the class itself. It is about expanding docs section with helpful examples. `string.Template` is undervalued, because it is hard to see how it can be more useful than standard string formatting functions. But for people coming from PHP world, this can be a good start. The docs just need an entrypoint that shows how to use locally defined variables in template string. PHP does this for strings automatically. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue19824> _______________________________________