Add tip on keyboard shortcut for ace-jump-mode

core/prelude-core.el

@@ -394,6 +394,7 @@ Doesn't mess with special buffers."
     "Press <C-Backspace> to kill a line backwards."
     "Press <C-S-Backspace> or <s-k> to kill the whole line."
     "Press <s-j> or <C-^> to join lines."
+    "Press <s-.> or <C-c j> to jump to the start of a word in any visible window."
     "Press <f11> to toggle fullscreen mode."
     "Press <f12> to toggle the menu bar."
     "Explore the Tools->Prelude menu to find out about some of Prelude extensions to Emacs."