Style tweaks

Author: Jeff Larkin

.readthedocs.yml

@@ -16,5 +16,4 @@ python:
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
-  builder: singlehtml
   configuration: conf.py

conf.py

@@ -18,7 +18,7 @@
 # -- Project information -----------------------------------------------------
 
 project = 'OpenACC Programming and Best Practices Guide'
-copyright = '2020, OpenACC.org'
+copyright = '2023, OpenACC.org'
 author = 'OpenACC.org'
 
 
@@ -51,7 +51,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'default'
+html_theme = 'sphinx_rtd_theme'
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,