change-log-search-tag-name
change-log-search-tag-name is a compiled Lisp function in `add-log.el
'.
(change-log-search-tag-name &optional AT)
Search for a tag name near `point'.
Optional argument AT non-nil means search near buffer position AT.
Return value is a cons whose car is the string representing
the tag and whose cdr is the position where the tag was found.