fix the order in which template Funcs are applied

[Googlom]

Solution to #544.

The bug occured because layout.template methods result...

telebot/layout/layout.go

Lines 511 to 520 in c6bead1

	func (lt *Layout) template(tmpl *template.Template, locale string) *template.Template {
	funcs := make(template.FuncMap)
	// Redefining built-in blank functions
	funcs["config"] = lt.String
	funcs["text"] = func(k string, args ...interface{}) string { return lt.TextLocale(locale, k, args...) }
	funcs["locale"] = func() string { return locale }
	return tmpl.Funcs(funcs)
	}

was overwritten by method template.Funcs(lt.funcs) which applies...

telebot/layout/layout.go

Lines 285 to 289 in c6bead1

	tmpl, err := lt.template(template.New(k), locale).Funcs(lt.funcs).Parse(string(data))
	if err != nil {
	log.Println("telebot/layout:", err)
	return nil
	}

builtinFuncs:

telebot/layout/layout.go

Lines 99 to 104 in c6bead1

	var builtinFuncs = template.FuncMap{
	// Built-in blank and helper functions.
	"locale": func() string { return "" },
	"config": func(string) string { return "" },
	"text": func(string, ...interface{}) string { return "" },
	}

[demget]

Thank you, a good catch!