Help text: say "Ctrl/Alt-arrows" for scroll

ober

a659c7d533ecfd6a1a6115ac69d12d533b7e9706

diff --git a/src/jcode/ui/tui.ss b/src/jcode/ui/tui.ss
index 658b44e..ce07515 100644
--- a/src/jcode/ui/tui.ss
+++ b/src/jcode/ui/tui.ss
@@ -572,7 +572,7 @@
                "  /sidebar    Toggle sidebar (Ctrl-B)"
                "  /quit       Exit"
                ""
-               "Keys: Alt-Enter submit | PgUp/PgDn or Ctrl/Alt-↑/↓ scroll | Ctrl-C cancel | Shift-Tab toggle PLAN/BUILD")
+               "Keys: Alt-Enter submit | PgUp/PgDn or Ctrl/Alt-arrows scroll | Ctrl-C cancel | Shift-Tab toggle PLAN/BUILD")
              "\n"))))
       ((equal? cmd "quit")
        (app-state-quit?-set! state #t))