Read and write file in binary mode to remove BOM (Byte Order Mark) bytes

openformats/formats/docx.py

@@ -124,7 +124,7 @@ def __init__(self, content):
 
     def get_document(self):
         if self.__document is None:
-            with io.open(self.__document_path, 'r') as f:
+            with io.open(self.__document_path, 'rb') as f:
                 self.__document = f.read()
 
         return self.__document
@@ -137,7 +137,7 @@ def set_document(self, document):
 
     def get_document_rels(self):
         if self.__document_rels is None:
-            with io.open(self.__document_rels_path, 'r') as f:
+            with io.open(self.__document_rels_path, 'rb') as f:
                 self.__document_rels = f.read()
 
         return self.__document_rels