Adding a tag with '&' causes ExpatError.

[aslam karachiwala]

v. 0.3.r1334~ubuntu13.04.1

1. Right-click an existing task and select 'Modify tags...'
2. Enter a new tag: a&b
3. Click 'Add/remove tags'.
4. Double click the task to open it.
5. Dialog open saying, "GTG 0.3.1 has crashed..."
6. Clicking 'Details' shows the trace.
7. Click 'Ignore error.'
8. Double-click the task again, it doesn't open.
9. Normal functioning requires closing and re-launching GTG.

Adding a tag by editing the task in task editor also raises the same error

Trace:
Traceback (most recent call last):
  File "/usr/share/gtg/GTG/gtk/editor/taskviewserial.py", line 157, in unserialize
    element = xml.dom.minidom.parseString(data)
  File "/usr/lib/python2.7/xml/dom/minidom.py", line 1931, in parseString
    return expatbuilder.parseString(string)
  File "/usr/lib/python2.7/xml/dom/expatbuilder.py", line 940, in parseString
    return builder.parseString(string)
  File "/usr/lib/python2.7/xml/dom/expatbuilder.py", line 223, in parseString
    parser.Parse(string, True)
ExpatError: not well-formed (invalid token): line 1, column 18

Would help to specify the character restrictions for tags in the docs.

[Parin Porecha (parinporecha)]

Pushed revision 1335 containing the fix for this bug.

Now, you can create tags with '&' in it.
However, it has caused Bug #1261772. I'm trying to find out the cause for it

[aslam karachiwala (akwala)]

Confirming fix. Thanks!