[Bug 288930] New: Threading by subject: Subject Prefixes not case-insensitive

[Bernd Oliver Sünderhauf]

https://bugs.kde.org/show_bug.cgi?id=288930

           Summary: Threading by subject: Subject Prefixes not
                    case-insensitive
           Product: kmail2
           Version: 4.7
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: message list
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: pancho at kriko.org


Version:           4.7 (using KDE 4.7.3) 
OS:                Linux

When messages are threaded by subject, Subject Prefixes are not recognized on a
case-insensitive basis as stated in the config dialog (Composer->Subject).

Reproducible: Didn't try

Steps to Reproduce:
Turn on threading by subject.
Now write three empty emails to yourself, each as a new email (not a reply),
with the following subjects:
(1st) "Test"
(2nd) "Re: Test"
(3rd) "Re : Test"
(4th) "Re[2]: Test"
(5th) "RE: Test"
(6th) "RE : Test"
(7th) "RE[2]: Test"


Actual Results:  
You will find the 2nd, 3rd and 4th mail be wrapped under the 1st one, but not
the 5th, 6th and 7th one.

Expected Results:  
The 5th, 6th and 7th mail should be wrapped just as well under the 1st message.

Additional remarks:
- The Subject Prefixes are indeed correctly recognized on a case-insensitive
basis for replacement in an answer's subject.

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