[tests] Fix version string checking

tests/thin_check.rs

@@ -13,14 +13,14 @@ use common::*;
 #[test]
 fn accepts_v() -> Result<()> {
     let stdout = thin_check!("-V").read()?;
-    assert_eq!(stdout, tools_version());
+    assert!(stdout.contains(tools_version()));
     Ok(())
 }
 
 #[test]
 fn accepts_version() -> Result<()> {
     let stdout = thin_check!("--version").read()?;
-    assert_eq!(stdout, tools_version());
+    assert!(stdout.contains(tools_version()));
     Ok(())
 }