Today, once again, the ultimate [X]HTML parser using regular expressions answer came to my attention and I have decided to try to typset it using XeLaTeX. The result is far from perfect, worse even than Chrome's rendering.
Is there a way I can improve the result? Is XeLaTeX and LuaLaTeX incapable of handling the Ponny?
MWE:
\documentclass[]{article}
\usepackage{lmodern}
\usepackage{amssymb,amsmath}
\usepackage{ifxetex,ifluatex}
\usepackage{fontspec}
\defaultfontfeatures{Mapping=tex-text,Scale=MatchLowercase}
\IfFileExists{upquote.sty}{\usepackage{upquote}}{}
\IfFileExists{microtype.sty}{\usepackage{microtype}}{}
\usepackage[normalem]{ulem}
\setmainfont{Doulos SIL}
\title{html - RegEx match open tags except XHTML self-contained tags - Stack
Overflow}
\date{}
\author{StackOverflow}
\begin{document}
\maketitle
Rege̿̔̉x-based
HTML parsers are the cancer that is killing StackOverflow \emph{it is
too late it is too late we cannot be saved} the trangession of a chi͡ld
ensures regex will consume all living tissue (except for HTML which it
cannot, as previously prophesied) \emph{dear lord help us how can anyone
survive this scourge} using regex to parse HTML has doomed humanity to
an eternity of dread torture and security holes \emph{using rege}x as a
tool to process HTML establishes a brea\emph{ch between this world} and
the dread realm of c͒ͪo͛ͫrrupt entities (like SGML entities, but \emph{more
corrupt) a mere glimp}se of the world of reg\textbf{ex parsers for HTML
will ins}tantly transport a p\emph{rogrammer's consciousness i}nto a
w\emph{orl}d of ceaseless screaming, he comes\sout{, the pestilent
sl}ithy regex-infection wil\textbf{l devour your HT}ML parser,
application and existence for all time like Visual Basic only worse
\emph{he comes he com}es \emph{do not fi}ght h\textbf{e com̡e̶s, ̕h̵i}s
un̨ho͞ly radiańcé de\emph{stro҉ying all enli̍̈́̂̈́ghtenment, HTML tags
\textbf{lea͠ki̧n͘g fr̶ǫm ̡yo͟ur eye͢s̸ ̛l̕ik͏e liq}uid p}ain, the song of re̸gular
expre\sout{ssion parsing} will exti\emph{nguish the voices of
mor\textbf{tal man from the sp}here I can see it can you see ̲͚̖͔̙î̩́t̲͎̩̱͔́̋̀ it is
beautiful t}he f\texttt{inal snuf}fing o\emph{f the lie\textbf{s of
Man ALL IS LOŚ͖̩͇̗̪̏̈́T A}}\textbf{LL IS L}OST th\emph{e pon̷y he come}s he
c̶̮om\sout{es he co}\textbf{\sout{me}s t\emph{he} ich}or permeat\emph{es
al}l MY FAC\emph{E MY FACE ᵒh god n\textbf{o NO NOO̼}}\textbf{OO N}Θ
stop t\emph{he an*̶͑̾̾̅ͫ͏̙̤g͇̫͛͆̾ͫ̑͆l͖͉̗̩̳̟̍ͫͥͨ}e̠̅s\texttt{ ͎a̧͈͖r̽̾̈́͒͑e} n\textbf{ot rè̑ͧ̌aͨl̘̝̙̃ͤ͂̾̆ ZA̡͊͠͝LGΌ ISͮ̂҉̯͈͕̹̘̱ T}O͇̹̺ͅƝ̴ȳ̳
TH̘\textbf{Ë͖́̉ ͠P̯͍̭O̚N̐Y̡ H̸̡̪̯ͨ͊̽̅̾̎Ȩ̬̩̾͛ͪ̈́̀́͘ ̶̧̨̱̹̭̯ͧ̾ͬC̷̙̲̝͖ͭ̏ͥͮ͟Oͮ͏̮̪̝͍M̲̖͊̒ͪͩͬ̚̚͜Ȇ̴̟̟͙̞ͩ͌͝}S̨̥̫͎̭ͯ̿̔̀ͅ
\end{document}
UPDATE
Using the Doulos SIL font gets me something closer to what Firefox renders but still far from perfect.