[Docs] Correct spelling the "_none_" stopwords element
@@ -132,7 +132,7 @@ The `standard` analyzer accepts the following parameters:
`stopwords`::
A pre-defined stop words list like `_english_` or an array containing a
- list of stop words. Defaults to `\_none_`.
+ list of stop words. Defaults to `_none_`.
`stopwords_path`::
