D25532: Port extractxml to Python 3 with minor typo fixes

[Yuri Chornoivan]

yurchor created this revision.
yurchor added a reviewer: Localization.
Herald added a project: KDE Edu.
Herald added a subscriber: kde-edu.
yurchor requested review of this revision.

REVISION SUMMARY
  Minor porting with some typos fixed, in case it will be needed some day

TEST PLAN
  Tested with https://phabricator.kde.org/D25405 and seems to work as expected.

REPOSITORY
  R341 Step

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D25532

AFFECTED FILES
  step/data/extractxml

To: yurchor, #localization
Cc: kde-edu, narvaez, apol
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