bug#36525: M-x default when cursor on top of a M-x command in INFO

[Juri Linkov]

> I will point out that `M-.' is a repeatable
> key.  And a repeatable key is good for a
> command that is repeatable, such as doing
> something to/with consecutive bits of text
> (e.g. "things") from a buffer.

A keybinding doesn't need to be a single key
to be repeatable.  ‘C-x e e e’ is repeatable.