Examples of line continuation characters in Bash, Command (Batch) and PowerShell.
Bash / zsh / sh
cd apps/my-app
rushx build-native \
--platform ios \
--flavor dev \
--clean
Batch (dos command script)
cd apps/my-app
rushx build-native ^
--platform ios ^
--flavor dev ^
--clean
PowerShell
cd apps/my-app
rushx build-native `
--platform ios `
--flavor dev `
--clean