[Bug 527740] New: [ml_IN] Applying Backspace to a chillu conjunct followed by punctuation/SPACE results in deletion of the chillu also

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Summary: [ml_IN] Applying Backspace to a chillu conjunct followed by punctuation/SPACE results in deletion of the chillu also

https://bugzilla.redhat.com/show_bug.cgi?id=527740

           Summary: [ml_IN] Applying Backspace to a chillu conjunct
                    followed by punctuation/SPACE results in deletion of
                    the chillu also
           Product: Fedora
           Version: rawhide
          Platform: All
        OS/Version: Linux
            Status: NEW
          Keywords: i18n
          Severity: medium
          Priority: low
         Component: pango
        AssignedTo: besfahbo at redhat.com
        ReportedBy: apeter at redhat.com
         QAContact: extras-qa at fedoraproject.org
                CC: eng-i18n-bugs at redhat.com, besfahbo at redhat.com,
                    fedora-fonts-bugs-list at redhat.com,
                    smc-discuss at googlegroups.com
    Classification: Fedora
    Target Release: ---


Created an attachment (id=363982)
 --> (https://bugzilla.redhat.com/attachment.cgi?id=363982)
Screenshot for chillu conjuncts

Description of problem:
When chillu conjuncts are followed by any punctuation marks like "!", ".", ",",
"'", "?" or SPACE, ie when a word ends with a chillu conjunct, and followed by
a punctuation mark or a SPACE, using Backspace to delete the punctuation mark
or SPACE results in the deletion of chillu conjunct together with the
punctuation mark/SPACE.

Version-Release number of selected component (if applicable):
pango 1.26.0-1.fc12 i686

How reproducible:
Always

Steps to Reproduce:
1. Open gedit
2. type any of chillu conjunct, eg: 0D28, 0D4D, 200D
OR
type a word ending with chillu conjunct, eg: 0D05, 0D35, 0D28, 0D4D, 200D
3. type any punctuation marks like "!", ".", ",", "'", "?" or SPACE
4. Press Backspace

Actual results:
When using Backspace after chillu conjunct followed by punctuation mark or
SPACE, instead of deleting punctuation mark or SPACE only, the chillu conjunct
also gets deleted.

Expected results:
When using Backspace after chillu conjunct followed by punctuation mark or
SPACE, only the punctuation mark/SPACE should get deleted.

Additional info:
1. This does not happen when chillu comes in between a word. eg:  നന്‍മ (0D28,
0D28, 0D4D, 200D, 0D2E)
2. This issue is not present in oowriter and kwrite. When above steps are
reproduced, deletions happens in correct order. 
Versions used:
libicu-4.2.1-6.fc12 i686
qt-4.5.2-22.fc12 i686
3. Screenshot attached for chillu conjuncts and eg of words with chillu

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