Merge branch 'ds/fetch-pull-with-sparse-index'

"git fetch" and "git pull" are now declared sparse-index clean. Also "git ls-files" learns the "--sparse" option to help debugging. * ds/fetch-pull-with-sparse-index: test-read-cache: remove --table, --expand options t1091/t3705: remove 'test-tool read-cache --table' t1092: replace 'read-cache --table' with 'ls-files --sparse' ls-files: add --sparse option fetch/pull: use the sparse index