From 68b174870de3861236be267992bcfef54f25ea6b Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Sun, 8 Jan 2023 15:05:34 +0000
Subject: [PATCH] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 xarray/core/concat.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/xarray/core/concat.py b/xarray/core/concat.py
index f492269b916..67023c800f1 100644
--- a/xarray/core/concat.py
+++ b/xarray/core/concat.py
@@ -613,7 +613,11 @@ def get_indexes(name):
                 # do not concat if:
                 # 1. variable is only present in one dataset of multiple datasets and
                 # 2. dim is not a dimension of variable
-                if dim not in variables[0].dims and len(variables) == 1 and len(datasets) > 1:
+                if (
+                    dim not in variables[0].dims
+                    and len(variables) == 1
+                    and len(datasets) > 1
+                ):
                     combined_var = variables[0]
                 # only concat if variable is in multiple datasets
                 # or if single dataset (GH1988)