Unicode issue with Greek accented vowels in prosody

[JoshuaCCampbell]

Unicode has two code points for acute accented vowels, one in the Greek and Coptic block and one in the Greek extended block (for omicron they are U+03CC and U+1F79. The list of accented vowels only takes into account the acute accents in the Greek and Coptic block resulting in some vowels not being properly scanned.

>>> from cltk.prosody.grc import Scansion
>>> text_string = "πότνια, θῦμον"
>>> Scansion()._make_syllables(text_string)
[[['πότνι', 'α'], ['θῦ', 'μον']]]

Expected behavior

>>> from cltk.prosody.grc import Scansion
>>> text_string = "πότνια, θῦμον"
>>> Scansion()._make_syllables(text_string)
[[['πο', 'τνι' , 'α'], ['θῦ', 'μον']]]

Desktop

• MacOS 13.0

[pharos-alexandria]

Working with Greek, I normalize (unicodedata.normalize to NFC) everything before processing further. U+1F79 is normalized to U+03CC (https://www.unicode.org/charts/normalization/).