FIXUP: minor style fixes in the test

Author: Totktonada

test/mysql.test.lua

@@ -519,7 +519,7 @@ end
 local function test_ffi_null_printing(test, pool)
     test:plan(4)
     local function json_result(keep_null, prepared)
-        local conn, err = mysql.connect({ host = host, port = port, user = user,
+        local conn, err = mysql.connect({host = host, port = port, user = user,
             password = password, db = db, keep_null = keep_null})
         if conn == nil then error(err) end
         local rows
@@ -537,7 +537,6 @@ local function test_ffi_null_printing(test, pool)
     res = json_result(true, false)
     test:ok(res == '[[{"x":null,"w":1}]]', 'execute keep_null enabled')
     res = json_result(false, false)
-
     test:ok(res == '[[{"w":1}]]', 'execute keep_null disabled')
 end