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

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

Author: pre-commit-ci[bot]

source/conf.py

@@ -7,7 +7,9 @@
 RTD_BUILD = bool(os.getenv("READTHEDOCS"))
 RTD_PR_BUILD = RTD_BUILD and os.getenv("READTHEDOCS_VERSION_TYPE") == "external"
 RTD_URL = os.getenv("READTHEDOCS_CANONICAL_URL")
-RTD_CANONICAL_BUILD = RTD_BUILD and not RTD_PR_BUILD and "packaging.python.org" in RTD_URL
+RTD_CANONICAL_BUILD = (
+    RTD_BUILD and not RTD_PR_BUILD and "packaging.python.org" in RTD_URL
+)
 
 project = "Python Packaging User Guide"