Edits#78

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ryandmaggio wants to merge 7 commits intoidank:masterfrom

Commits on Mar 17, 2022

actually the updated one now
ryandmaggio
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Commits on Mar 28, 2022

Maybe-redy-to-deploy changes to parser, definitely not to tests
ryandmaggio
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brought the unchanged parts of parser up to date with current bashlex
ryandmaggio
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Commits on Apr 4, 2022

Commits on Apr 13, 2022

Bypass raise NotImplemented for arithmetic expansion
ryandmaggio
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Commits on Apr 14, 2022

added comments to the pattern_list parsing
ryandmaggio
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