Okay, so I've come across another issue with a FirstFileContentDate format that isn't being recognized. These particular docs always put a period at the end of a 3-letter month, so Jan. Feb. Mar. etc. So, a full example would be:
Aug. 14, 2017
The alpha month designations in my settings file mostly look like this:
That isn't catching these months. I'm pretty sure it's that period after the month that's causing the problem, but maybe I'm wrong.
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