Merge branch 'en/fast-import-parsing-fix'

"git fast-import" update. * en/fast-import-parsing-fix: fast-import: fix erroneous handling of get-mark with empty orphan commits fast-import: only allow cat-blob requests where it makes sense fast-import: check most prominent commands first git-fast-import.txt: fix wording about where ls command can appear t9300: demonstrate bug with get-mark and empty orphan commits