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

[積丹尼 Dan Jacobson]

1. Do (info "(emacs) Coding Systems")

2. Put the cursor on top of
‘M-x list-coding-systems’

3. Hit M-x

Wouldn't it be great if we saw that it was now the default in the minibuffer?

That way we could just hit RET to run it.

Currently C-h C-f knows what the cursor is on, but not M-x (ESC x).