Fix line too long in conftest.py docstring

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jason-curtis

tests/conftest.py

@@ -89,7 +89,8 @@ def assert_frame_equal(left, right, **kwargs):
 def nrel_api_key():
     """API key for NLR Developer Network (formerly NREL).
 
-    Checks NLR_API_KEY first, falls back to NREL_API_KEY with deprecation warning.
+    Checks NLR_API_KEY first, falls back to NREL_API_KEY
+    with deprecation warning.
     """
     try:
         demo_key = os.environ["NLR_API_KEY"]