A.6.1.12 Locating Globals for Template Expressions

The _caller_globals() function has been changed to use the name of a function rather a stack frame count. This is used by the methods AppContext.run_template(), AppContext.run_template_once(), RandomPageModuleMixin.display_response(), and SimpleContext.__init__() to locate the module whose globals will be used as the global namespace for evaluating template expressions.