Update input.html

Rich-Harris · web-flow · commit c872234a4b73 · 2017-09-07T17:30:18.000-04:00
diff --git a/test/validator/samples/a11y-html-has-lang/input.html b/test/validator/samples/a11y-html-has-lang/input.html
@@ -1,5 +1,5 @@
 <html lang="en"></html>
 <html lang="en-US"></html>
-<html lang={language}></html>
+<html lang={{language}}></html>
 
 <html></html>
