doc: Show how less noisy clang-tidy output can be achieved

Author: TheCharlatan

doc/developer-notes.md

@@ -217,11 +217,14 @@ apt install clang-tidy bear clang
 Then, pass clang as compiler to configure, and use bear to produce the `compile_commands.json`:
 
 ```sh
-./autogen.sh && ./configure CC=clang CXX=clang++
-make clean && bear make -j $(nproc)     # For bear 2.x
-make clean && bear -- make -j $(nproc)  # For bear 3.x
+./autogen.sh && ./configure CC=clang CXX=clang++ --enable-suppress-external-warnings
+make clean && bear --config src/.bear-tidy-config -- make -j $(nproc)
 ```
 
+The output is denoised of errors from external dependencies and includes with
+`--enable-suppress-external-warnings` and `--config src/.bear-tidy-config`. Both
+options may be omitted to view the full list of errors.
+
 To run clang-tidy on all source files:
 
 ```sh