ctest: Add generation, compilation, and running of tests for constants.

Author: mbyx

ctest-next/src/rustc_queries.rs

@@ -50,7 +50,7 @@ pub fn rustc_version() -> Result<RustcVersion> {
         .unwrap()
         .split('.')
         .take(3)
-        .map(|s| s.parse::<u8>())
+        .map(|s| s.trim().parse::<u8>())
         .collect::<Result<Vec<u8>, ParseIntError>>()?
         .try_into()
         .unwrap();