TemplateResource.parse handles paths containing multiple dots incorrectly

When TemplateResource.parse is passed a path that contains multiple dots the resulting resource drops the second dot and everything that follows it from the path. For example: foo.html.tpl becomes foo.html. This truncation is the cause of this bug in Spring Boot: https://github.com/spring-projects/spring-boot/issues/2212

I believe the problem can be solved by updating the regex declared in MarkupTemplateEngine to anchor the final group to the end of the string, i.e. I believe it could be a one character fix to add a $ to the end of the pattern:

(.+?)(?:_([a-z]{2}(?:_[A-Z]{2,3})))?\\.(\\p{Alnum}+)$