Re: which-func-mode keeps disappearing on the mode line

[Stefan Monnier]

> (defun trim-front-spaces (s)
>   (substring-no-properties s (string-match-p "[:space:]" s)))
> (setq which-func-cleanup-function 'trim-front-spaces)
> (which-function-mode 1)

Apparently which-func-cleanup-function ends up receiving a list of
strings (with a single element) rather than a string.  Part of the
reason appears to be which-func-imenu-joiner-function which defaults to
`last' which doesn't return the last element of a list, but the last
cons of a list.


        Stefan