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In functions returning `Result` you can avoid repeating `Ok()` all the time by moving it to the outermost scope.
Instead of:
match foo {
bar => Ok(1)
baz => Ok(2)
quz => Ok(3)
_ => Err("etc"),
}
use:
Ok(match foo {
bar => 1,
baz => 2,
quz => 3,
_ => Err("etc")?,
})
