Add CSS rule to hide the last empty line in code blocks to prevent displaying
unnecessary empty lines when source files end with a newline character.
The empty line remains in the DOM for proper copy-paste functionality.
Since code lines are wrapped in `<button>`-s, the native font styles overrides the parent's one which results in the font-family and font-size (esp. Safari) difference. This change fixes that.
PR Close#59072
To increase the ease of development we are moving @angular/docs into the adev directory within this repo. While
we are doing this to improve our development experience in the short term, efforts are also in place
to maintain a division between this @angular/docs (shared) code and adev itself, so that it can be extracted
back out in the future when components is ready to leverage it as well.
PR Close#57132
