Function to_string_pretty 

pub fn to_string_pretty<T>(value: &T) -> Result<String>
where
    T: Serialize,

Serializes a value to an indented EDN String.

Empty collections remain on one line and each item or map entry in a non-empty collection is indented by one tab per nesting level. Deeply nested subtrees fall back to compact formatting to bound indentation overhead.

Errors

See crate::error::Error. Always returns Code::Serde.