Rollup merge of #73342 - schteve:master, r=jonas-schievink
Rollup merge of #73342 - schteve:master, r=jonas-schievink

Fix iterator copied() documentation example code

The documentation for copied() gives example code with variable v_cloned instead of v_copied. This seems like a copy/paste error from cloned() and it would be clearer to use v_copied.

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