Minor typo fix.

src/com/degel/re_frame_firebase/helpers.cljs

@@ -45,7 +45,7 @@
                           ;; observed that such a callback exists specifically on .update.  With
                           ;; trepidation arising from minimal ad hoc testing, I am forwarding the second
                           ;; parameter, assuming that this behavior was undetected and inconsequential before
-                          ;; I wrotewrapped-handler to be multi-arity.
+                          ;; I wrote wrapped-handler to be multi-arity.
                           ;;
                           ;; [TODO] Find the reason for this 2-arity version and properly dispatch it.
                           ;;