bpo-36742: Corrects fix to handle decomposition in usernames (#13812)
diff --git a/Lib/urllib/parse.py b/Lib/urllib/parse.py
index daefb20..b660878 100644
--- a/Lib/urllib/parse.py
+++ b/Lib/urllib/parse.py
@@ -402,9 +402,9 @@
# looking for characters like \u2100 that expand to 'a/c'
# IDNA uses NFKC equivalence, so normalize for this check
import unicodedata
- n = netloc.rpartition('@')[2] # ignore anything to the left of '@'
- n = n.replace(':', '') # ignore characters already included
- n = n.replace('#', '') # but not the surrounding text
+ n = netloc.replace('@', '') # ignore characters already included
+ n = n.replace(':', '') # but not the surrounding text
+ n = n.replace('#', '')
n = n.replace('?', '')
netloc2 = unicodedata.normalize('NFKC', n)
if n == netloc2: