Allow revisions for compile-time stdin, just like with runtime stdin

Author: oli-obk

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "ui_test"
-version = "0.21.0"
+version = "0.21.1"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "A test framework for testing rustc diagnostics output"

Cargo.toml

@@ -637,7 +637,11 @@ impl dyn TestStatus {
 
         let mut cmd = build_command(path, &config, revision, comments)?;
         cmd.args(&extra_args);
-        let stdin = path.with_extension("stdin");
+        let stdin = path.with_extension(if revision.is_empty() {
+            "stdin".into()
+        } else {
+            format!("{revision}.stdin")
+        });
         if stdin.exists() {
             cmd.stdin(std::fs::File::open(stdin).unwrap());
         }