chore: simplify

lua/git.lua

@@ -11,6 +11,13 @@ local function show(buf_id, items, query)
   end
 end
 
+-- Diff current file against the index (staged version)
+local function diff()
+  vim.cmd.diffthis()
+  vim.cmd('vert Git show :./%')
+  vim.cmd.diffthis()
+end
+
 -- Deleted files can't be opened, so choosing one stages the deletion instead
 local function choose(item)
   if vim.uv.fs_stat(item.path) then return MiniPick.default_choose(item) end
@@ -18,6 +25,7 @@ local function choose(item)
 end
 
 return {
+  diff = diff,
   status = function()
     local lines = vim.fn.systemlist('git -c core.quotepath=false status -s -u')
     if vim.v.shell_error ~= 0 then