DOC Fix grammar in HashingVectorizer's docstring
@@ -634,7 +634,7 @@ class HashingVectorizer(TransformerMixin, _VectorizerMixin, BaseEstimator):
during the preprocessing step.
'ascii' is a fast method that only works on characters that have
a direct ASCII mapping.
- 'unicode' is a slightly slower method that works on any characters.
+ 'unicode' is a slightly slower method that works on any character.
None (default) does nothing.
Both 'ascii' and 'unicode' use NFKD normalization from
