replace vim-fugitive with neogit and diffview

lua/plugins/lsp.lua

@@ -9,6 +9,11 @@ local format_on_save = function(client, bufnr)
             group = augroup,
             buffer = bufnr,
             callback = function()
+                -- prevents format from being included in the undo history
+                -- this way the cursor doesn't jump around the file when
+                -- undoing
+                vim.cmd("silent! undojoin")
+
                 vim.lsp.buf.format({
                     bufnr = bufnr,
                     async = false,