Updating the doc to add the beginning label. I'm not sure if this was the way it was intended, but it looked strange with just an ending </label> tag. PR Close #28602
This is the result of running ```sh find ./ -iname "*.png" -exec pngcrush -brute -ow -- {} \; ``` [Summary of size reductions](https://docs.google.com/spreadsheets/d/12Qgx7DfKabWw0PJza6ozC1kCHTofi6wyBLWGtwLW7G4/preview) Last done in July, 2017 in #18243 PR Close #28479
PR Close #25170