Remove reference to `master` branch from CLI doc
MODIFY
repo2docker/__main__.py
repo2docker/__main__.py
@@ -96,7 +96,8 @@ def get_argparser():
argparser.add_argument(
"--ref",
help=(
- "If building a git url, which reference to check out. " "E.g., `master`."
+ "Reference to build instead of default reference. For example"
+ " branch name or commit for a Git repository."
),
)

Remove reference to `master` branch from CLI doc