tweak lua formatting options

modules/programs/nvim/init.lua

@@ -195,6 +195,15 @@ lspconfig.sumneko_lua.setup({
 			telemetry = {
 				enable = false,
 			},
+			format = {
+				enable = true,
+				-- Put format options here
+				-- NOTE: the value should be STRING!!
+				defaultConfig = {
+					indent_style = "space",
+					indent_size = "2",
+				},
+			},
 		},
 	},
 })