[isabelle-dev] [isabelle] Tiny minor backward-compatible changes to IFOL

[Klein, Gerwin (Data61, Kensington NSW)]

> On 3 May 2020, at 00:02, Makarius <makarius at sketis.net> wrote:
> 
> An alternative is to use "!" as originally proposed by Georgy Dunaev. My
> impression is that only the oldest users of Isabelle/FOL or HOL remember the
> historic use of "!" for universal quantification.

I use ! all the time, esp for input (but not only for input). It’s just so much quicker to type.

Cheers,
Gerwin