\f   U+000C form feed
\n   U+000A line feed or newline
\r   U+000D carriage return
\t   U+0009 horizontal tab
\v   U+000B vertical tab
\\   U+005C backslash
\'   U+0027 single quote  (valid escape only within rune literals)
\"   U+0022 double quote  (valid escape only within string literals)
</pre>

<p>
An unrecognized character following a backslash in a rune literal is illegal.
</p>

<pre class="ebnf">

r rn=function(i){c1(e,i);function e(r){var n;return r===void 0&&(r={}),n=i.call(this,g1(r))||this,n.type=u1.ATTRIBUTE,n.raws=n.raws||{},Object.defineProperty(n.raws,"unquoted",{get:Lr(function(){return n.value},"attr.raws.unquoted is deprecated. Call attr.value instead."),set:Lr(function(){return n.value},"Setting attr.raws.unquoted is deprecated and has no effect. attr.value is unescaped by default now.")}),n._constructed=!0,n}var t=e.prototype;return t.getQuotedValue=function(n){n===void 0&&(n={});var...