Help:Strip markers/testcases

T27417

Markup	Renders as
[[Lemma|<ref>Text</ref>]]	[1]

T16562

Markup	Renders as
{{#tag:source|<nowiki>foo</nowiki>|lang=java}}	foo

T20295

Strip markers exposed in HTML:

Markup	Renders as
== [[Link|<nowiki />]] ==