Vim1 Android 9 souce code download error

xiadan@ubuntu:~$ repo init -u -b khadas-vims-pie
Downloading Repo source from
remote: Enumerating objects: 6942, done.
remote: Counting objects: 100% (6942/6942), done.
remote: Compressing objects: 100% (3636/3636), done.
remote: Total 6942 (delta 4472), reused 5344 (delta 3232)
Receiving objects: 100% (6942/6942), 3.03 MiB | 2.27 MiB/s, done.
Resolving deltas: 100% (4472/4472), done.
Traceback (most recent call last):
File “/home/xiadan/.repo/repo/”, line 42, in
from git_config import RepoConfig
File “/home/xiadan/.repo/repo/”, line 770
self._Set(f’superproject.{key}’, value)
SyntaxError: invalid syntax

-----------i don,t know how to do it.can you help me thanks @jasonl
you can refer to this doc