Wrong datetime description in config.ini.example

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d2887d2

Cause it's not RawConfigParser(), it should be escaped.
It has to be %%Y%%m%%d for example, for it to work properly.

or it will show

configparser.InterpolationSyntaxError: '%' must be followed by '%' or '(', found: '%Y-%m-%d_%H-%M-%S}-{filename}'

error.