Overhaul lnt updatedb
#80
Open
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That command had a few issues, which I uncovered when I tried updating the Click dependency. First, it didn't specify the --delete-order parameter as being a multi-parameter, leading to the default value [] being interpreted as a string with value "[]", i.e. a non-empty string.
This led to the tool always trying to delete an order with value "[]", which is nonsensical. For some reason, that only happens with newer Click version.
This patch adds test coverage for --delete-order and makes it a multi valued parameter, which was obviously always the intent. It also improves the documentation for the various parameters, which was unclear in an attempt to be terse.