Auto-link in paragraph

This should be a link: http://example.com/hello-world.

Prevent autolink in links

This should be a link: http://example.com/hello-world

Prevent autolink in images

https://www.google.com/images/srpr/logo11w.png

Prevent autolink in XML tags

This should be a link: http://example.com/hello-world

Prevent autolink in code block

This shouldn't be a link: http://example.com/hello-world.