Wikimedia Bugzilla is closed!

I've added an alternative (shorter) method:

function ok (wikitext) { /* .. */ console.log(wikitext); }
function err () { /* .. */ console.log('err', arguments); }

$.getJSON(mw.util.wikiScript('api'), 'format=json&action=query&prop=revisions&rvprop=content&rvlimit=1&titles=User:Krinkle', function (data) {
  try { for ( var page in data.query.pages ) {
    var wikitext = data.query.pages[page].revisions[0]['*'];
    ok(wikitext);
  } } catch (e) {
    err(e);
  }
}).fail(err);