Document test data is missing xml:lang attribute when written

[wooldridge]

The data written for the following test has changed:

describe('a language-specified XML string', function(){
      var uri = '/test/write/lang1.xml';
      before(function(done){
        db.documents.write({
          uri: uri,
          contentType: 'application/xml',
          lang: 'fr',
          content: '<doc>oui</doc>'
          })
        .result(function(response){done();})
        .catch(done);
      });

Running on ML9 EA4 writes this:

<?xml version="1.0" encoding="UTF-8"?>
<doc xml:lang="fr">oui</doc>

Running on the latest trunk writes this:

<?xml version="1.0" encoding="UTF-8"?>
<doc>oui</doc>

(The written data no longer has an xml:lang attribute.)

This change causes the test to fail. Test is in this file:

https://github.com/marklogic/node-client-api/blob/develop/test-basic/documents-core.js

[wooldridge]

Internally, the above test is performing a PUT to /v1/documents as described here:

https://docs.marklogic.com/REST/PUT/v1/documents

with the following constructed path:

/v1/documents?uri=%2Ftest%2Fwrite%2Flang1.xml&lang=fr

The above documentation says the following for the "lang" URL parameter:

This parameter is deprecated and will be ignored

Because of this deprecation of the "lang" URL parameter (this deprecation happened in ML8), the test should be removed.

[wooldridge]

I don't see any documentation changes need regarding this. For instance, "lang" is not a property of the DocumentDescriptor object.

[wooldridge]

I confirmed with @ehennum deprecation of "lang" for PUTs and POSTs of documents in the REST layer.