Mark entity safe and reinstall escape -- make title display right Change to explicitly mark the string entity — as safe and reinstate escaping of doctitle. If this worked in the past maybe auto-escaping wasn't turned on. If it is in the newer versions of sphinx's jinja |safe is needed now (and |e isn't, but it doesn't seem to cause double escaping so....).

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