* [SPC]

* <Leader> - \ - :help mapleader

* <LocalLeader> - \ - :help maplocalleader

* s - window leader :SPDebuginfo!
https://spacevim.org/documentation/#vim-compatible-mode
The s key does replace cursor char, but in SpaceVim it is the Window key bindings specific leader key by default (which can be set on another key binding in dotfile). If you still prefer the origin function of s, you can use an empty string to disable this feature.