test: Harden against 2027(?) edition

Author: epage

tests/testsuite/edition.rs

@@ -135,7 +135,7 @@ fn unset_edition_with_unset_rust_version() {
 
     p.cargo("check -v")
         .with_stderr_data(str![[r#"
-[WARNING] no edition set: defaulting to the 2015 edition while the latest is 2024
+[WARNING] no edition set: defaulting to the 2015 edition while the latest is [..]
 [CHECKING] foo v0.1.0 ([ROOT]/foo)
 [RUNNING] `rustc [..] --edition=2015 [..]`
 [FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

tests/testsuite/publish.rs

@@ -142,6 +142,7 @@ fn duplicate_version() {
                 [package]
                 name = "foo"
                 version = "0.0.1"
+                edition = "2015"
                 authors = []
                 license = "MIT"
                 description = "foo"
@@ -160,7 +161,6 @@ See https://doc.rust-lang.org/cargo/reference/manifest.html#package-metadata for
 [PACKAGING] foo v0.0.1 ([ROOT]/foo)
 [PACKAGED] 4 files, [FILE_SIZE]B ([FILE_SIZE]B compressed)
 [VERIFYING] foo v0.0.1 ([ROOT]/foo)
-[WARNING] no edition set: defaulting to the 2015 edition while the latest is 2024
 [COMPILING] foo v0.0.1 ([ROOT]/foo/target/package/foo-0.0.1)
 [FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
 [UPLOADING] foo v0.0.1 ([ROOT]/foo)