COPYRIGHT: Apply suggestions from code review

Co-authored-by: Jakub Beránek <[email protected]>

Author: jonathanpallant

COPYRIGHT

@@ -20,13 +20,13 @@ We track licenses for third-party materials in two ways:
 
 * We use [REUSE](https://reuse.software) to track license information for
   in-tree source files - both those authored by the Rust project and those
-  authored by third-parties. See `REUSE.toml`, and our cached output of the
+  authored by third parties. See `REUSE.toml`, and our cached output of the
   `reuse` tool which is committed to `license-metadata.json`.
 * We use `cargo` to track license information for out-of-tree dependencies.
 
 These two sources of information are collected by the tool `generate-copyright`
 into a file called `COPYRIGHT.html`, which is shipped with each binary release
-of Rust. Please refer that file for detailed information as to the components of
-any given Rust release. We also produce a `COPYRIGHT-library.html` which only
+of Rust. Please refer to that file for detailed information as to the components of
+any given Rust release. We also produce a `COPYRIGHT-library.html` file which only
 covers the subset of source code used in the Rust Standard Library, as opposed
 to the toolchain as a whole.