* files.el (file-name-sans-versions): Allow - and a-z in version

* files.el (file-name-sans-versions): Allow - and a-z in version
names.

* log-view.el (log-view-mode-map, log-view-mode-menu): Bind
log-view-annotate-version.
(log-view-beginning-of-defun, log-view-end-of-defun)
(log-view-annotate-version): New functions.
(log-view-mode): Use log-view-beginning-of-defun and
log-view-end-of-defun.