data-url-encode-macro 1.0.1

Rust macro to generate base64+percent-encoded strings suitable for data URLs in compile time
Documentation 
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use data_url_encode_macro::data_url_encode;

const HTML: &str = data_url_encode!("<h1>Hello, World!</h1>");

#[test]
fn test_encode() {
    assert_eq!(HTML, "PGgxPkhlbGxvLCBXb3JsZCE8L2gxPg%3D%3D");
}