bug#60860: 29.0.60; set save-silently to t can not avoid messages when saving files

[Juri Linkov]

>> To do the same, in Emacs 29 it's possible to add all these strings
>> like "Saving file..." to 'inhibit-message-regexps'.
>
> I tried to set (setq inhibit-message-regexps "^Saving"), but the message
> in acho area still exist when saving file.

Please also customize 'set-message-functions' so that its first element
is 'inhibit-message'.  Also 'inhibit-message-regexps' should be a list.
These settings should disable the message:

  (setq inhibit-message-regexps '("^Saving"))
  (setq set-message-functions '(inhibit-message))