bug#55041: 28.1; repeat-mode always prints message when enabled

[Juri Linkov]

> I'd kinda like to inhibit stdout and leave stderr, to put it in those terms.
> IMHO the above seems like unnecessary information. Yes
> it's specific, but it's also of little use.  I enabled repeat-mode, I expect
> it to be enabled, I don't really care that 23 commands and 9 keymaps
> were affected vs some other number of commands; and I don't need
> help like "see describe-repeat-maps" every time I enable it.

Then what do you think about doing what all minor modes do, i.e. to
display these messages conditionally on (called-interactively-p 'any).