The documentation about command lookup could be more clear and note differences between Windows and Linux/OSX.
Current text gives the impression that if one passes `options.env` without `PATH` that the path search will fall back on `process.env.PATH`.
However in reality, passing environment without PATH to execvp causes it to look for the binary only in `/usr/bin:/bin`.
Also Windows behaves different and more in line with the current documentation text.

References:
https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/execvp.3.html
https://linux.die.net/man/3/execvp

https://github.com/nodejs/node/blob/c61870c376e2f5b0dbaa939972c46745e21cdbdd/deps/uv/src/unix/process.c#L337
https://github.com/nodejs/node/blob/c61870c376e2f5b0dbaa939972c46745e21cdbdd/deps/uv/src/win/process.c#L1017

Co-authored-by: Tierney Cyren <[email protected]>

Language fix.

Co-authored-by: Rich Trott <[email protected]>