Rephrase the crate description.

Author: olson-sean-k

README.md

@@ -1,6 +1,7 @@
 **Tardar** is a Rust library that provides extensions for the [`miette`] crate.
 Diagnostic `Result`s are the primary extension, which pair an output with
-accumulated `Diagnostic`s in both the `Ok` and `Err` variants.
+accumulated `Diagnostic`s for both success and failure (the `Ok` and `Err`
+variants).
 
 [![GitHub](https://img.shields.io/badge/GitHub-olson--sean--k/tardar-8da0cb?logo=github&style=for-the-badge)](https://github.com/olson-sean-k/tardar)
 [![docs.rs](https://img.shields.io/badge/docs.rs-tardar-66c2a5?logo=rust&style=for-the-badge)](https://docs.rs/tardar)