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Preserve potential mood for equal or NUL sign

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Original `var_os` description said that it _may_ return an error if the value contains `=` or NUL. Let's make no promises on the `None` return value in these situation either, keep it in the [potential mood](https://en.wikipedia.org/wiki/Grammatical_mood#Potential).
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fleetingbytes 2023-04-03 19:30:20 +02:00 • committed by GitHub
parent a450557a54
commit 4cb73cc7d0
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1 changed files with 3 additions and 5 deletions
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8
library/std/src/env.rs
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@ -236,11 +236,9 @@ fn _var(key: &OsStr) -> Result<String, VarError> {
}
/// Fetches the environment variable `key` from the current process, returning
/// [`None`] in the following situations:
///
/// - the environment variable isn't set
/// - the environment variable's name contains
/// the equal sign character (`=`) or the NUL character
/// [`None`] if the environment variable isn't set. It may return `None` also
/// if the environment variable's name contains
/// the equal sign character (`=`) or the NUL character.
///
/// Note that the method will not check if the environment variable
/// is valid Unicode. If you want to have an error on invalid UTF-8,