Andrew Dona-Couch 42c4cb1d87 Add fmt filter that swaps the first two arguments to format!().
This allows a more natural filter usage: `{{ val | fmt("{:?}") }}`
as well as enabling convenient filter composition:
`{{ price | to_f64 | fmt("${:.2}") | center }}`
2020-07-14 20:48:15 +02:00
..
2020-01-02 22:58:13 +01:00