[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

pytest-embedded-arduino/tests/test_arduino.py

@@ -8,12 +8,8 @@ def test_arduino_serial_flash(testdir):
 
         def test_arduino_app(app, dut):
             expected_bin = os.path.join({
-                os.path.join(testdir.tmpdir,
-                    'hello_world_arduino',
-                    'build',
-                    'hello_world_arduino.ino.merged.bin'
-                )
-            })
+        os.path.join(testdir.tmpdir, 'hello_world_arduino', 'build', 'hello_world_arduino.ino.merged.bin')
+    })
             assert app.binary_file == expected_bin
             assert app.target == 'esp32'
             expected_fqbn = (