Update to latest HTML5lib, Add Maruku testdir

Sync with the latest html5lib.
Having the Maruku unit tests on-hand may be useful for debugging; so let's include them.

vendor/plugins/maruku/tests/unittest/escaping.md

@@ -0,0 +1,89 @@
+This should threat the last as a literal asterisk.
+*** Parameters: ***
+{:on_error=>:warning}
+*** Markdown input: ***
+ Hello: ! \! \` \{ \} \[ \] \( \) \# \. \! * \* *
+
+
+Ora, *emphasis*, **bold**, * <- due asterischi-> * , un underscore-> _ , _emphasis_,
+ incre*dible*e!
+
+This is ``Code with a special: -> ` <- ``(after)
+
+`Start ` of paragraph
+
+End of `paragraph `
+*** Output of inspect ***
+md_el(:document,[
+	md_par(["Hello: ! ! ` { } [ ] ( ) # . ! * * *"]),
+	md_par([
+		"Ora, ",
+		md_em(["emphasis"]),
+		", ",
+		md_strong(["bold"]),
+		", * <- due asterischi-> * , un underscore-> _ , ",
+		md_em(["emphasis"]),
+		", incre",
+		md_em(["dible"]),
+		"e!"
+	]),
+	md_par(["This is ", md_code("Code with a special: -> ` <-"), "(after)"]),
+	md_par([md_code("Start "), " of paragraph"]),
+	md_par(["End of ", md_code("paragraph ")])
+],{},[])
+*** Output of to_html ***
+<p>Hello: ! ! ` { } [ ] ( ) # . ! * * *</p>
+
+<p>Ora, <em>emphasis</em>, <strong>bold</strong>, * &lt;- due asterischi-&gt; * , un underscore-&gt; _ , <em>emphasis</em>, incre<em>dible</em>e!</p>
+
+<p>This is <code>Code with a special: -&gt; ` &lt;-</code>(after)</p>
+
+<p><code>Start </code> of paragraph</p>
+
+<p>End of <code>paragraph </code></p>
+*** Output of to_latex ***
+Hello: ! ! ` \{ \} [ ] ( ) \# . ! * * *
+
+Ora, \emph{emphasis}, \textbf{bold}, * {\tt \char60}- due asterischi-{\tt \char62} * , un underscore-{\tt \char62} \_ , \emph{emphasis}, incre\emph{dible}e!
+
+This is {\colorbox[rgb]{1.00,0.93,1.00}{\tt Code~with~a~special\char58~\char45\char62~\char96~\char60\char45}}(after)
+
+{\colorbox[rgb]{1.00,0.93,1.00}{\tt Start~}} of paragraph
+
+End of {\colorbox[rgb]{1.00,0.93,1.00}{\tt paragraph~}}
+*** Output of to_md ***
+Hello: ! ! ` { } [ ] ( ) # . ! * * *
+
+Ora, emphasis, bold, * <- due
+asterischi-> * , un underscore-> _ ,
+emphasis, incre diblee!
+
+This is (after)
+
+of paragraph
+
+End of
+*** Output of to_s ***
+Hello: ! ! ` { } [ ] ( ) # . ! * * *Ora, emphasis, bold, * <- due asterischi-> * , un underscore-> _ , emphasis, incrediblee!This is (after) of paragraphEnd of
+*** EOF ***
+
+
+
+	OK!
+
+
+
+*** Output of Markdown.pl ***
+<p>Hello: ! ! ` { } [ ] ( ) # . ! * * *</p>
+
+<p>Ora, <em>emphasis</em>, <strong>bold</strong>, * &lt;- due asterischi-> * , un underscore-> _ , <em>emphasis</em>,
+ incre<em>dible</em>e!</p>
+
+<p>This is <code>Code with a special: -&gt; ` &lt;-</code>(after)</p>
+
+<p><code>Start</code> of paragraph</p>
+
+<p>End of <code>paragraph</code></p>
+
+*** Output of Markdown.pl (parsed) ***
+Error: #<NoMethodError: private method `write_children' called for <div> ... </>:REXML::Element>