Added good and bad styles.
Added good and bad styles.

Before: https://g3doc.corp.google.com/third_party/dart_src/angular/g3doc/effective/change-detection.md
After: https://g3doc.corp.google.com/third_party/dart_src/angular/g3doc/effective/change-detection.md?cl=243695455
PiperOrigin-RevId: 243712359

angulardart/angular,matanlurey/angular,matanlurey/angular,angulardart/angular,angulardart/angular,matanlurey/angular