Tests p:string-replace
Test ab-string-replace-004.xml is expected to pass.
<p:declare-step xmlns:p="http://www.w3.org/ns/xproc" version="3.0">
   <p:input port="source">
   <p:output port="result">
   <p:string-replace match="comment() | processing-instruction()" replace="''">
</p:declare-step>
<doc>
         <?pi bar?>
   <para>some <!-- comment -->text</para>
   <!-- comment -->
</doc>
<s:schema xmlns="http://www.w3.org/1999/xhtml" xmlns:s="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
   <s:pattern>
      <s:rule context="/">
         <s:assert test="doc">Root element is not 'doc'.</s:assert>
         <s:assert test="count(processing-instruction() | comment())=0">Document node should not have pi or comment nodes.</s:assert>
         <s:assert test="count(doc/processing-instruction() | doc/comment())=0">Element "doc" should not have pi or comment nodes.</s:assert>
         <s:assert test="doc/para">Element "doc" does not have a child "para".</s:assert>
         <s:assert test="doc/para/text()='some text'">Element 'para's text is not 'some text'.</s:assert>
      </s:rule>
   </s:pattern>
</s:schema>
Added attribute 'queryBinding' to schematron's schema.
Porting 1.0 tests for p:string-replace