貌似是 29.1 的修改导致， 同一份配置， 在 28.2 上还起作用的, 起始就这个 hook, post_init 不再被调用了
(defun helm/pre-init-auto-highlight-symbol ()
(spacemacs|use-package-add-hook auto-highlight-symbol
:post-init
;; add some functions to ahs transient states
(setq spacemacs--symbol-highlight-transient-state-doc
(concat
spacemacs--symbol-highlight-transient-state-doc
" Search: [_s_] swoop [_b_] buffers [_f_] files [_/_] project"))
(spacemacs/transient-state-register-add-bindings 'symbol-highlight
'(("s" spacemacs/helm-swoop-region-or-symbol :exit t)
("b" spacemacs/helm-buffers-smart-do-search-region-or-symbol :exit t)
("f" spacemacs/helm-files-smart-do-search-region-or-symbol :exit t)
("/" spacemacs/helm-project-smart-do-search-region-or-symbol :exit t)))))