[xml] Are there any chance to keep single quotes as attribute text boundary?

libxml replaces single quotes in attribute with double quotes when
reading and then dumping xml document:

int main()
  xmlDocPtr doc;
  char * str = "<aaa bbb='ccc'/>"; 
  doc = xmlReadMemory(str, strlen(str), "include.xml", NULL, 0); 
  xmlDocDump(stdout, doc);

running this will show 

<?xml version="1.0"?>
<aaa bbb="ccc"/>

This is not diff safely :-/

Are there any chance to keep formatting as it were, at least for
elements that were not changed during tree elements manipulation? May
be there is some parsing options I do not know of?

If not how difficult would it be to add such support, in your opinion,
and would it be added if somebody offers the patch? or this does not
fit some project's conception?

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