* vc-hooks.el (vc-insert-file, vc-state, vc-working-revision)

* vc-hooks.el (vc-insert-file, vc-state, vc-working-revision)
(vc-check-master-templates, vc-file-not-found-hook)
(vc-kill-buffer-hook):
* vc.el (vc-process-sentinel, vc-exec-after, vc-do-command)
(vc-find-position-by-context, vc-buffer-context)
(vc-restore-buffer-context, vc-responsible-backend)
(vc-expand-dirs, vc-ensure-vc-buffer, vc-buffer-sync)
(vc-next-action, vc-register, vc-register-with, vc-steal-lock)
(vc-finish-logentry, vc-coding-system-for-diff, vc-switches)
(vc-version-diff, vc-diff, vc-insert-headers)
(vc-dired-buffers-for-dir, vc-dired-resynch-file)
(vc-snapshot-precondition, vc-create-snapshot, vc-print-log)
(vc-revert, vc-rollback, vc-version-backup-file)
(vc-rename-master, vc-delete-file, vc-rename-file)
(vc-branch-part, vc-default-retrieve-snapshot)
(vc-annotate-display-autoscale, vc-annotate-display-select)
(vc-annotate, vc-annotate-warp-revision, vc-annotate-difference)
(vc-annotate-lines, vc-file-tree-walk-internal): Use when instead of if.
(vc-dir-update): Handle directories.
(vc-default-status-printer): Simplify.