base: reimplement date formatting for invoice printout
Do not rely on DateTime.strftime which does fails on dates <= 1900. This simple case does not need all the features of strftime and can be implemented inline.
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Do not rely on DateTime.strftime which does fails on dates <= 1900. This simple case does not need all the features of strftime and can be implemented inline.
mentioned in commit ef2aec16
·mentioned in commit ef2aec16