{{Strikethrough}} surrounds the parameter it's given with the HTML <s></s> tags, producing output such as: this, i.e. test with a line drawn through its middle. Outside articles, it can be used to mark something as no longer accurate or relevant without removing it from view. Do not use it, however, to indicate document edits; to mark a span of text as having been removed from a document, use <del></del>.

Markup
Output

{{strikethrough|HyperText Markup Language}} 
HyperText Markup Language