issue2551075 Update jinja template to bootstrap 4. Updated to 4.1.3 (current boostrap version 4.4.1). The pull request has been around for a while. (Patch: Paul Spooner; templates merged by Christof Meerwald; other merged by John Rouillard)

#!/usr/bin/env python
from __future__ import print_function
import zlib, base64, sys
print(base64.encodestring(zlib.compress(sys.stdin.read())))