Auto merge of #31819 - miqid:doc, r=steveklabnik
Auto merge of #31819 - miqid:doc, r=steveklabnik

Hello.

I came across some minor spelling mistakes while going through the documentation for the `Iterator` trait. Also includes a suggested styling fix.

r? @steveklabnik

GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,GBGamer/rust,graydon/rust,GBGamer/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,GBGamer/rust,graydon/rust,GBGamer/rust,GBGamer/rust,graydon/rust