Issue #3224478 by ankithashetty, varshith, longwave, platinum1: Update HTML specification link for /filter/tips

Issue #2490136 by timmillwood, Manjit.Singh, xjm, webchick, dixon_, Bojhan, googletorp, dawehner, cilefen, jstoller, mikeburrelljr, naveenvalecha, giorgio79, platinum1, Crell, markdorison, skwashd, moshe weitzman, amateescu, jhedstrom, nateswart: Enable revisions by default