neovim: associate \<Ctrl+k> to show keybindings; makes them more easily discoverable

hosts/common/programs/neovim/plugins.nix

@@ -12,6 +12,8 @@ with pkgs.vimPlugins;
       local wk = require("which-key")
       -- in "n"ormal mode, Ctrl+k will show all keybindings
       vim.api.nvim_set_keymap("n", "<C-k>", "", { callback=wk.show, desc = "show keybinds" })
+      -- or \<Ctrl-k>, because `\` *already* shows keybinds (but only those under \)
+      vim.api.nvim_set_keymap("n", "<Leader><C-k>", "", { callback=wk.show, desc = "show keybinds" })
     '';
   }
   {
@@ -227,7 +229,7 @@ with pkgs.vimPlugins;
   }
   {
     # show commit which last modified text under the cursor.
-    # trigger with `:GitMessenger` or `<leader>gm` (i.e. `\gm`)
+    # trigger with `:GitMessenger` or `<Leader>gm` (i.e. `\gm`)
     plugin = git-messenger-vim;
   }
   {