add encoding (satwikkansal#122)

hippieZhou · satwikkansal · commit 31dcd9b0629f · 2019-06-06T23:45:34.000+05:30
if not set encoding attr,there maybe have some exceptions when open reading.
diff --git a/wtfpython-pypi/wtf_python/main.py b/wtfpython-pypi/wtf_python/main.py
@@ -21,7 +21,7 @@ def fetch_updated_doc():
 
 
 def render_doc():
-    with open(file_name, 'r') as f:
+    with open(file_name, 'r', encoding='utf-8') as f:
         content = f.read()
         pydoc.pager(content)
 
