typo

vim/vimbox

@@ -1,7 +1,7 @@
 #!/bin/bash
 function helpexit() {
     echo Edit a file with check list mod of vim
-    echo "key 'a' adds a checkbox, space toggles the box"
+    echo "key 'b' adds a checkbox, space toggles the box"
     echo All switches are passed on to vim.
     exit
 }