Rollup merge of #71296 - ChiefMilesEdgeworth:fix_doc_wording, r=Dylan-DPC
Rollup merge of #71296 - ChiefMilesEdgeworth:fix_doc_wording, r=Dylan-DPC

Change wording on read_vectored docs

Closes #70154

I'm happy to work with others to make the wording on this more clear. I think what I have is an improvement but may not be the final wording.

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