fix encoding to utf-8

ippisite/docs/source/conf.py

@@ -60,6 +60,7 @@ extensions = [
     "sphinxcontrib.bibtex",
 ]
 
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]
 
@@ -69,6 +70,9 @@ templates_path = ["_templates"]
 # source_suffix = ['.rst', '.md']
 source_suffix = ".rst"
 
+# The encoding of all reST source files. 
+source_encoding = "utf-8-sig"
+
 # The master toctree document.
 master_doc = "index"