Fix: crates -> a list of crates

Author: giraffate

src/crates-io.md

@@ -16,8 +16,8 @@ TODO: what is the vetting process?
 
 ## Pemitted dependencies
 
-The `tidy` tool has [crates that are allowed]. To add a
+The `tidy` tool has [a list of crates that are allowed]. To add a
 dependency that is not already in the compiler, you will need to add it to these
 crates.
 
-[crates that are allowed]: https://github.com/rust-lang/rust/blob/19ecce332e56941ea0dd2a805270faa102acdb14/src/tools/tidy/src/deps.rs#L59
+[a list of crates that are allowed]: https://github.com/rust-lang/rust/blob/19ecce332e56941ea0dd2a805270faa102acdb14/src/tools/tidy/src/deps.rs#L59