run_suite_skylab: fix indentation error

BUG=chromium:948755
TEST=local run

Change-Id: Iab2abcc083a5381534c90cd2f312c86123b8cd0e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/1549574
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Tested-by: Aviv Keshet <akeshet@chromium.org>
diff --git a/venv/skylab_suite/suite_runner.py b/venv/skylab_suite/suite_runner.py
index 3cea765..808ccee 100644
--- a/venv/skylab_suite/suite_runner.py
+++ b/venv/skylab_suite/suite_runner.py
@@ -222,7 +222,7 @@
 # SWARMING_SERVER environment variable. See crbug.com/948774
 def _is_dev():
     """Detect whether skylab tool should be invoked with -dev flag."""
-     return 'chromium-swarm-dev' in os.environ['SWARMING_SERVER']
+    return 'chromium-swarm-dev' in os.environ['SWARMING_SERVER']
 
 def _compute_tags(build, suite_id):
     tags = [