Correct description of panic.rs

[felix91gr]

I was perusing the module documentation and stumbled upon the existing description, which confused me for a minute.

Summary:

The foremost description of this module was:

Panic support in the standard library.

This commit changes that to:

Panic support in core.

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[jhpratt]

Can you elaborate about what in particular you found confusing about the current description?

[felix91gr]

Can you elaborate about what in particular you found confusing about the current description?

Of course :)

I was examining the panic module in core and I was greeted by this description:

I'm doing research and writing for safety critical rust. Since the distinction between std and core is extremely important in safety critical (like for e.g. https://rust-lang.zulipchat.com/#narrow/channel/122651-general/topic/How.20can.20I.20screw.20up.20my.20panic.20handler.3F/with/599176809), having the description of the module state "you are currently looking at std" when that's not true... made me wonder if I got lost and landed on a broken doc.

Dunno, the contradiction was a bit unsettling in that moment. I'm not the most seasoned rust dev by a long shot, so when the docs say something that contradicts my understanding of the language, I tend to assume I must be mistaken. This is not the case here, right? This should say "core" instead of "the standard library", right? I'm not 100% sure even right now.