Rollup merge of #67180 - NieDzejkob:vec-doc-copied, r=Dylan-DPC
Rollup merge of #67180 - NieDzejkob:vec-doc-copied, r=Dylan-DPC

doc: Use .copied() instead of .cloned() in Vec example

None

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