C++ name and add-log-current-defun

["Herbert Euler" <herberteuler@hotmail.com>]

add-log-current-defun cannot handle C++ names well.  For
example, the current function:

    int some_class::some_method(int arg)
    {
        // ...
    }

If one invoke add-change-log-entry-other-window when point
is in this function, one would get

    * some_file.cpp (class::some_method):

rather than

    * some_file.cpp (some_class::some_method):

This is because add-log-current-defun in add-log.el calculates
the function name wrong.  Below is the code:

    ;; Now find the right beginning of the name.
    ;; Include certain keywords if they
    ;; precede the name.
    (setq middle (point))
    (forward-word -1)
    ;; Is this C++ method?
    ;; ...

(forward-word -1) wouldn't put point before `some_class',
but puts point before `c' in `some_class'.

How about changing it to like this?

    (while (not (looking-back "\\(^\\|[ \t]\\)"))
      (backward-word 1))

Regards,
Guanpeng Xu

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