DOC: Exclude tests from documentation

Exclude tests from documentation.

doc/conf.py

@@ -52,7 +52,7 @@
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = []
+exclude_patterns = ["*tests*"]
 
 # Sources
 source_suffix = ".rst"