Document the PATH that Command searchs #137286
Description
Location
Summary
On all platforms, we search the child's PATH rather than the PATH of the spawning process. This is enforced by this standard library test: https://github.com/rust-lang/rust/blob/ed49386d3aa3a445a9889707fd405df01723eced/library/std/tests/process_spawning.rs
Separately we should also document platform specific behaviour, even if it's subject to change.
This might require libs-api sign off but I feel this should be documented because it's somewhat surprising.