Improve style for multiline string
@@ -216,9 +216,11 @@ def unpack_url(
# be removed.
if link.is_existing_dir():
deprecated(
- reason="pip copied the source tree into a temporary directory "
+ reason=(
+ "pip copied the source tree into a temporary directory "
"before building it. This is changing so that packages are built in-place "
- 'within the original source tree ("in-tree build").',
+ 'within the original source tree ("in-tree build").'
+ ),
replacement=None,
gone_in="21.3",
feature_flag="in-tree-build",
