Implement output support for embedded PCDATA values

This is a bit awkward since preserving correct indentation structure requires
a bit of extra work, and the closing tag has to be written by _start function
to correctly process the rest of the tree.

src/pugixml.cpp

@@ -4018,6 +4018,9 @@ PUGI__NS_BEGIN
 		if (node->first_attribute)
 			node_output_attributes(writer, node, indent, indent_length, flags, depth);
 
+		// element nodes can have value if parse_embed_pcdata was used
+		if (!node->value)
+		{
 			if (!node->first_child)
 			{
 				writer.write(' ', '/', '>');
@@ -4031,6 +4034,26 @@ PUGI__NS_BEGIN
 				return true;
 			}
 		}
+		else
+		{
+			writer.write('>');
+
+			text_output(writer, node->value, ctx_special_pcdata, flags);
+
+			if (!node->first_child)
+			{
+				writer.write('<', '/');
+				writer.write_string(name);
+				writer.write('>');
+
+				return false;
+			}
+			else
+			{
+				return true;
+			}
+		}
+	}
 
 	PUGI__FN void node_output_end(xml_buffered_writer& writer, xml_node_struct* node)
 	{
@@ -4136,6 +4159,10 @@ PUGI__NS_BEGIN
 
 					if (node_output_start(writer, node, indent, indent_length, flags, depth))
 					{
+						// element nodes can have value if parse_embed_pcdata was used
+						if (node->value)
+							indent_flags = 0;
+
 						node = node->first_child;
 						depth++;
 						continue;