[PUSHED] Fix spelling errors and typos: 'unkown' change to 'unknown'

[Thorsten Behrens (via Code Review)]

Hi,

Thank you for your patch!  It has been merged to LibreOffice.

If you are interested in details, please visit

    https://gerrit.libreoffice.org/3030

Approvals:
  Thorsten Behrens: Verified; Looks good to me, approved


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Gerrit-MessageType: merged
Gerrit-Change-Id: Ia3ff77d2b99c9ef6c4c9b510bb30f349592c0b94
Gerrit-PatchSet: 2
Gerrit-Project: core
Gerrit-Branch: master
Gerrit-Owner: Thomas Arnhold <thomas at arnhold.org>
Gerrit-Reviewer: Thorsten Behrens <tbehrens at suse.com>