Comment 2 for bug 1403450

I just reproduced it on Ubuntu 14.10 this way:

1) Start QLE
2) Select Thunderbird launcher item
3) Click "Basic options" button
4) Enter "test test" as name, "test" as command
5) Save and close

It has generated following section in thunderbird.desktop:

[Desktop Action test test]

This is invalid section name, only 2 spaces are allowed between brackets:

/tmp/thunderbird.desktop: error: file contains group "Desktop Action test test", which has an invalid action identifier, only alphanumeric characters and '-' are allowed

It could only be

[Desktop Action test-test]