add uppercasing in vim

.config/nvim/init.vim

@@ -323,6 +323,10 @@ map <leader>V :vsp ~/.config/nvim/init.vim<cr>
 " since u undoes, would it not make sense that U redoes?
 nnoremap U <C-r>
 
+" when in insertion mode, C-u uppercases the current word, C-l lowercases it,
+inoremap <C-u> <esc>gUiw`]a
+inoremap <C-l> <esc>guiw`]a
+
 " get rid of the help message popping up when I miss esc and hit F1
 nnoremap <F1> <ESC>
 inoremap <F1> <ESC>
@@ -340,6 +344,7 @@ nnoremap <leader>t :vsp .<cr>
 nnoremap <leader>T :tabedit .<cr>
 
 " save current buffer with Ctrl-s
+" TODO do I need this? I reflexively use :w
 nnoremap <C-s> :w<cr>
 
 " open/close NERDtree with leader-e