Rollup merge of #87838 - jetomit:add-readdir-note, r=dtolnay
Rollup merge of #87838 - jetomit:add-readdir-note, r=dtolnay

Document that fs::read_dir skips . and ..

Hi,

I think this is worth noting in the docs since it differs from POSIX `readdir`. I didn’t put it under platform-specific notes because it seems to be consistent across platforms, and changing this behavior in the future could cause pretty nasty bugs.

Thanks!

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