git mv boards/nucleo-l476 boards/nucleo-l476rg
git grep -l 'nucleo-l476' | xargs sed -i 's/nucleo-l476/nucleo-l476rg/g'
git grep -l 'Nucleo-L476' | xargs sed -i 's/Nucleo-L476/Nucleo-L476RG/g'
git add boards/nucleo-l476rg
git commit -m 'boards/nucleo-l476rg: rename to standard st name'
git add examples
git commit -m 'examples: use new nucleo-l476rg name'
git add tests
git commit -m 'tests: use new nucleo-l476rg name'