Minor grammatical fix in comment. I am good at English.
@@ -574,7 +574,7 @@ pub(crate) fn docker_envvars(
let (major, minor, patch) = match options.rustc_version.as_ref() {
Some(version) => (version.major, version.minor, version.patch),
- // no toolchain version available, always provide older
+ // no toolchain version available, always provide the oldest
// compiler available. this isn't a major issue because
// linking will libgcc will not include symbols found in
// the builtins.
