broccoli

Rename git/submodules-with-sparse-checkout-step-by-step.md to git/submodule-with-sparse-checkout/submodules-with-sparse-checkout-step-by-step.md

Rename mysql/safest-mysql-space-recovery.md to mysql/safest-space-recovery/safest-mysql-space-recovery.md

Create safest-mysql-space-recovery.md

Update submodules-with-sparse-checkout-step-by-step.md

Create submodules-with-sparse-checkout-step-by-step.md