Update oudated CutomLoader code example (#1185)

py3 for CustomLoader example

diff --git a/src/jinja2/loaders.py b/src/jinja2/loaders.py
index 6e546c00b31f3b98fbc36bef83795690a782c15f..09f678d74b68b7d627d0eef0eec18e8b1753a840 100644 (file)
--- a/src/jinja2/loaders.py
+++ b/src/jinja2/loaders.py
@@ -55,8 +55,8 @@ class BaseLoader:
                 if not exists(path):
                     raise TemplateNotFound(template)
                 mtime = getmtime(path)
-                with file(path) as f:
-                    source = f.read().decode('utf-8')
+                with open(path) as f:
+                    source = f.read()
                 return source, path, lambda: mtime == getmtime(path)
     """