Updating FlexibleDateTimeFormatter to cover edge cases #770
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arp-0984
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Adding extra date format patterns to cover edge cases and updating characters to remove from dates.
Attempting these formats is optional and specified with a boolean passed to the parse() function. The basic set of formats (FORMAT_DATETIME_MAIN) are attempted first to parse the date, and if none of them are successful, then the more comprehensive set of date formats (FORMAT_DATETIME_EXTRA) are attempted.
Testing with the new patterns covers all the edge cases I could find. I attempted to explain the new patterns in the config file. Utilizing DateTimeFormatter is tricky because it requires an exact match of a pattern to the provided date string. The goal here is not to be able to literally parse any date, but just match the behavior of the existing DateTimeFormatterLegacy class.