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

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

Author: pre-commit-ci[bot]

.readthedocs.yml

@@ -1,3 +1,4 @@
+---
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 
@@ -17,9 +18,9 @@ sphinx:
 
 # Optionally build your docs in additional formats such as PDF
 formats:
-  - pdf
+- pdf
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
   install:
-    - requirements: requirements.txt
+  - requirements: requirements.txt