Rollup merge of #47532 - tbu-:pr_path_oddities, r=TimNN
Rollup merge of #47532 - tbu-:pr_path_oddities, r=TimNN

Add some edge cases to the documentation of `Path`

Affected methods are `starts_with` and `strip_prefix`.

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