QXmlEdit is not sufficiently careful about attribute names ending up in XML files it cannot read

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Open an XML file
2. Create an attribute with a space in its name (QXmlEdit happily accepts it)
3. Save the XML file
4. Try to reopen the file
5. See QXmlEdit complain that it is uncapable to open the file because it is 
invalid

What is the expected output? What do you see instead?

QXmlEdit should refuse to add attributes with invalid names.

QXmlEdit does not complain and then saves a file that cannot be re-opened any 
more.

What version of the product are you using? On what operating system?

0.4.9 on linux.
Please provide any additional information below.

Original issue reported on code.google.com by sergio.c...@gmail.com on 30 Sep 2010 at 5:57

[GoogleCodeExporter]

Original comment by lbello...@gmail.com on 30 Sep 2010 at 6:10

• Changed state: Accepted

[GoogleCodeExporter]

Original comment by lbello...@gmail.com on 1 Oct 2010 at 9:08

• Changed state: Started

[GoogleCodeExporter]

Original comment by lbello...@gmail.com on 1 Oct 2010 at 9:55

[GoogleCodeExporter]

Fixed in rev 156, but using the Unicode Basic Multilingual Plane (BMP) only. 
This limitation will be removed in a future.

Original comment by lbello...@gmail.com on 4 Oct 2010 at 9:09

• Changed state: Fixed

[GoogleCodeExporter]

I would like to thank you for the extremely quick response to the bug report 
and also to take the occasion to express my appreciation for this software 
project!

Original comment by sergio.c...@gmail.com on 4 Oct 2010 at 9:43