email-gravatar.py: fix UTF-8

filters/email-gravatar.py

@@ -20,6 +20,7 @@
 
 import sys
 import hashlib
+import codecs
 
 email = sys.argv[1].lower().strip()
 if email[0] == '<':
@@ -29,6 +30,9 @@ if email[-1] == '>':
 
 page = sys.argv[2]
 
+sys.stdin = codecs.getreader("utf-8")(sys.stdin.detach())
+sys.stdout = codecs.getwriter("utf-8")(sys.stdout.detach())
+
 md5 = hashlib.md5(email.encode()).hexdigest()
 text = sys.stdin.read().strip()