test-import-git: update test to match latest logic

Summary:
The new behavior seems better - no extra space between name and email.

  In [1]: b'\xc3\xab'.decode()
  Out[1]: 'ë'

Reviewed By: zzl0

Differential Revision: D64990478

fbshipit-source-id: c97ae0a0f8c19854a1f4292daf001d6105161fc7

eden/scm/tests/test-import-git.t

@@ -833,10 +833,9 @@ Test email metadata
   > +a
   > EOF
   applying patch from stdin
-Python 3 email parser is slightly different - it inserts a space in "user".
   $ hg --encoding utf-8 log -r .
   commit:      * (glob)
-  user:        Rapha\xc3\xabl Hertzog  <hertzog@debian.org> (esc)
+  user:        Raphaël Hertzog <hertzog@debian.org>
   date:        * (glob)
   summary:     \xc5\xa7\xe2\x82\xac\xc3\x9f\xe1\xb9\xaa (esc)