fix validate-query error message

Author: darkleaf

src/datascript/parser.cljc

@@ -696,7 +696,7 @@
       (raise "Query for unknown vars: " (mapv :symbol unknown)
              {:error :parser/query, :vars unknown, :form form}))
     (when-not (empty? shared)
-      (raise ":in and :with should not use same variables: " (mapv :symbol shared)
+      (raise ":find and :with should not use same variables: " (mapv :symbol shared)
              {:error :parser/query, :vars shared, :form form})))
 
   (let [in-vars    (collect-vars (:qin q))

test/datascript/test/parser_query.cljc

@@ -23,7 +23,7 @@
     "Query for unknown vars: [?t]"
 
     '[:find ?x ?e :with ?y ?e :where [?x ?e ?y]]
-    ":in and :with should not use same variables: [?e]"
+    ":find and :with should not use same variables: [?e]"
 
     '[:find ?e :in $ $ ?x :where [?e]]
     "Vars used in :in should be distinct"