Merge branch 'en/sparse-cone-becomes-default'

Merge branch 'en/sparse-cone-becomes-default'

Deprecate non-cone mode of the sparse-checkout feature.

* en/sparse-cone-becomes-default:
  Documentation: some sparsity wording clarifications
  git-sparse-checkout.txt: mark non-cone mode as deprecated
  git-sparse-checkout.txt: flesh out pattern set sections a bit
  git-sparse-checkout.txt: add a new EXAMPLES section
  git-sparse-checkout.txt: shuffle some sections and mark as internal
  git-sparse-checkout.txt: update docs for deprecation of 'init'
  git-sparse-checkout.txt: wording updates for the cone mode default
  sparse-checkout: make --cone the default
  tests: stop assuming --no-cone is the default mode for sparse-checkout