Fix #520 Red underline upon sentence completion#679

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icburns:fix-520-spellcheck-end-of-sentence

Commits on Aug 19, 2022

#520 modify CHECKABILITY_CONTAINS_PERIOD logic to account for period only present in the last index (valid end of sentence).
icburns
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#520 modify CHECKABILITY_CONTAINS_PERIOD logic to for capitalized words in suggestions.
icburns
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