Updated documentation of replaceParams() in base string templates
Updated documentation of replaceParams() in base string templates

null shall be returned when the required getter is missing. Since the usage of
replaceParams is modified, the function being replaced with a generator of
function, returning null will help to spot places where the change has not
been applied.

eric-brechemier/lb_js_scalableApp,eric-brechemier/lb_js_scalableApp,eric-brechemier/lb_js_scalableApp