I'm adding methods as I see fit (they're extracted from real working software). If you write a new method that is helpful, please submit a patch (with tests)! But before you do that, remember that the ...
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Format String Guide

A format string is a text string that contains placeholders for values. These placeholders begin with a '{', contain the name or index of the value, and end with a '}'. "--title-format '{user-name:5}' ...