[MacPorts] #61530: dblatex @0.3.11₁ can be built with Python 3

[MacPorts]

#61530: dblatex @0.3.11₁ can be built with Python 3
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 Reporter:  ballapete  |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.6.4
 Keywords:  bigsur     |       Port:  dblatex
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 Because I would like to live in Big Sur (and outside) without an extra
 version of Python 2.7 I translated the `dblatex` Python 2 files to Python
 3 files – mostly by means of `2to3`. One exception is
 `lib/dbtexmf/core/dbtex.py` which uses quite often the `file()` function
 which I had to translate manually to `open()`. Since I am not a Python
 programmer I presume that the internet is right here.

 By means of a cumulative patch file of diffs from 2to3 it worked to build
 with Python 3.8. Since I do not know how to 'make test' in Python I am
 leaving this to others. And I also have to leave actual test of this
 Python 3.8 variant dblatex to others since I have no use case for it. And
 also do not know how to create one or better two.

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Ticket URL: <https://trac.macports.org/ticket/61530>
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