-
-Enclose QUERY-STRING in parentheses if it matches
-`notmuch-search-disjunctive-regexp'."
- (if (string-match-p notmuch-search-disjunctive-regexp query-string)
+Enclose QUERY-STRING in parentheses if contains \"OR\" operators."
+ (if (string-match-p "\\<[oO][rR]\\>" query-string)