Fix typo

Co-authored-by: Simon Li <orpheus+devel@gmail.com>
2022-07-26 11:51:15 -07:00 · 2022-07-26 11:51:15 -07:00 · c21374d305
commit c21374d305
--- a/repo2docker/app.py
+++ b/repo2docker/app.py
@ -431,7 +431,7 @@ class Repo2Docker(Application):
        help="""
        Base image to use when building docker images.

-        Should be an ubuntu derivative, minimum 18.04.
+        Should be an Ubuntu derivative, minimum 18.04.
        """,
    )