postats.py broken with Python 3

[Richard Kimberly Heck]

../lyx-stable/po/ [⚡ 2.3.x] > /usr/bin/python3 ./postats.py "2.3.5.2"
ar.po bg.po cs.po de.po el.po en.po es.po eu.po fi.po fr.po he.po hu.po
ia.po id.po it.po ja.po nb.po nl.po nn.po pl.po pt_BR.po pt_PT.po ru.po
sk.po sv.po tr.po uk.po zh_CN.po zh_TW.po >i18n.inc
Traceback (most recent call last):
  File "./postats.py", line 144, in <module>
    )?>""" % (sys.argv[1], branch_tag, ",".join([run_msgfmt(po) for po
in sys.argv[2:] if po not in ommitted])))
  File "./postats.py", line 144, in <listcomp>
    )?>""" % (sys.argv[1], branch_tag, ",".join([run_msgfmt(po) for po
in sys.argv[2:] if po not in ommitted])))
  File "./postats.py", line 103, in run_msgfmt
    header = read_pofile(pofile)
  File "./postats.py", line 72, in read_pofile
    for line in open(pofile):
  File "/usr/lib64/python3.7/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xd8 in position
872: ordinal not in range(128)

../lyx-stable/po/ [⚡ 2.3.x] > /usr/bin/python2 ./postats.py "2.3.5.2"
ar.po bg.po cs.po de.po el.po en.po es.po eu.po fi.po fr.po he.po hu.po
ia.po id.po it.po ja.po nb.po nl.po nn.po pl.po pt_BR.po pt_PT.po ru.po
sk.po sv.po tr.po uk.po zh_CN.po zh_TW.po >i18n.inc

Success!

Riki