Steps to reproduce:
- Edit the relevant kind of template: https://en.wikipedia.org/wiki/Template:Piccadilly_line_RDT?veaction=editsource
- The very first line says {{BS-map. Change that to {{#invoke:Routemap|convertbs|<nowiki>{{BS-map
- Scroll almost to the end. Find the line that says }}<noinclude>. Change that to }}</nowiki>}}<noinclude>.
- Preview page.
Results: You get useless strip markers:
Expected results: A long, ugly string of useful wikitext:
