Update rustc-driver-getting-diagnostics.md

src/rustc-driver-getting-diagnostics.md

@@ -1,14 +1,19 @@
 # Example: Getting diagnostic through `rustc_interface`
 
-`rustc_interface` allows you to intercept diagnostics that would otherwise be printed to stderr.
+The [`rustc_interface`] allows you to intercept diagnostics that would
+otherwise be printed to stderr.
 
 ## Getting diagnostics
 
 To get diagnostics from the compiler,
-configure `rustc_interface::Config` to output diagnostic to a buffer,
-and run `TyCtxt.analysis`. The following was tested
+configure [`rustc_interface::Config`] to output diagnostic to a buffer,
+and run [`TyCtxt.analysis`]. The following was tested
 with <!-- date-check: jan 2024 --> `nightly-2024-01-19`:
 
 ```rust
 {{#include ../examples/rustc-driver-getting-diagnostics.rs}}
 ```
+
+[`rustc_interface`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/index.html
+[`rustc_interface::Config`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/interface/struct.Config.html
+[`TyCtxt.analysis`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/passes/fn.analysis.html