Fix completions docstring

Author: cichli

src/cljs_tooling/complete.clj

@@ -203,8 +203,8 @@
   (.startsWith ^String (:candidate candidate) (str prefix)))
 
 (defn completions
-  "Returns a sequence of matching completions given current namespace and a
-  prefix string."
+  "Returns a sequence of candidate data for completions matching the given
+  prefix string and (optionally) the current namespace."
   ([env prefix] (completions env prefix nil))
   ([env prefix context-ns]
    (let [prefix (u/as-sym prefix)