--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -948,6 +948,9 @@ def shortuser(user):
     f = user.find('<')
     if f >= 0:
         user = user[f+1:]
+    f = user.find(' ')
+    if f >= 0:
+        user = user[:f]
     return user
 
 def walkrepos(path):