Last modified: 2014-01-12 10:06:12 UTC
It should be possible to make tests at [[Special:ExpandTemplates]] without reloading the whole page after every small change in the code. There is already an API for that, except for the option "Suppress <nowiki> tags in result", it seems: https://en.wikipedia.org/wiki/Special:ApiSandbox#action=expandtemplates&title=Test&text=%7B%7BU%7CExample%7D%7D
What on earth is "Suppress <nowiki> tags in result" for exactly, anyway?
Ok, so this option appears to have just come out of nowhere in 2009; there's no bugzilla reference or explanation for the feature on the commit: <https://git.wikimedia.org/commitdiff/mediawiki%2Fextensions%2FExpandTemplates.git/49697f70851757ef31a2221c84d95f4e9e217e2f> I'm not sure it's useful or needs to be kept, but if it is desirable, it appears to be implemented as a post-processing regular expression and could be trivially done in JavaScript along with an AJAX load from the API.
special page was moved to core