brushkit 0.3.0

Readers and tip renderers for Photoshop .abr and Procreate .brush and .brushset files, as one dependency over brushkit-abr and brushkit-preview
Documentation 
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//! The README usage block and examples/readme.rs are the same code, so the
//! README compiles whenever the example does.

use std::path::Path;

#[test]
fn readme_usage_block_is_the_example() {
    let manifest = Path::new(env!("CARGO_MANIFEST_DIR"));
    let readme = [manifest.join("README.md"), manifest.join("../../README.md")]
        .iter()
        .find_map(|p| std::fs::read_to_string(p).ok())
        .expect("README.md at the manifest or the workspace root");
    let block = readme
        .split("```rust\n")
        .nth(1)
        .and_then(|rest| rest.split("```").next())
        .expect("a rust block in README.md");

    let example = include_str!("../examples/readme.rs");
    let body = example
        .lines()
        .skip_while(|line| line.starts_with("//!") || line.is_empty())
        .collect::<Vec<_>>()
        .join("\n")
        + "\n";

    assert_eq!(
        block, body,
        "README.md usage block differs from examples/readme.rs"
    );
}