Fix indent error which would have prevented choice expiration to work.

Change-Id: I077e05eea23ad58d1dde2c9fe5608660a56d03e5
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/318815
Tested-by: Xin Li <delphij@google.com>
Reviewed-by: Amith Dsouza <amithds@google.com>
Reviewed-by: Raman Tenneti <rtenneti@google.com>

git_superproject.py

diff --git a/git_superproject.py b/git_superproject.py
index ce68690..377b9e9 100644
--- a/git_superproject.py
+++ b/git_superproject.py
@@ -371,7 +371,7 @@
         print(('You are not currently enrolled in Git submodules experiment '
                '(go/android-submodules-quickstart).  Use --use-superproject '
                'to override.\n'), file=sys.stderr)
-    return user_value
+      return user_value
 
   # We don't have an unexpired choice, ask for one.
   system_cfg = RepoConfig.ForSystem()