* helm-source.el: Use identify only whe fuzzy is enabled.
* helm.el: Fix negation in fuzzy search.
(helm-fuzzy-search,
helm-search-from-candidate-buffer,
helm-search-match-part): Do it.
* helm.el (helm-search-match-part): Handle also negation in multiple pattern matching.
* helm.el (helm-search-match-part): Handle also fuzzy in multiples match.
* helm.el (helm-search-match-part): Reindent.