Rust assert should have a literal second argument

Author: sourcefrog

src/backup.rs

@@ -475,7 +475,11 @@ mod tests {
         assert_eq!(stats.compressed_bytes, 8);
 
         // Will vary depending on compressor and we don't want to be too brittle.
-        assert!(stats.compressed_bytes <= 19, stats.compressed_bytes);
+        assert!(
+            stats.compressed_bytes <= 19,
+            "too many compressed_bytes: {}",
+            stats.compressed_bytes
+        );
 
         // Try to read back
         let (back, sizes) = block_dir.get(&addrs[0]).unwrap();

src/band.rs

@@ -327,6 +327,10 @@ mod tests {
 
         let e = Band::open(&af, &BandId::zero());
         let e_str = e.unwrap_err().to_string();
-        assert!(e_str.contains("Band version \"0.8.8\" in"), e_str);
+        assert!(
+            e_str.contains("Band version \"0.8.8\" in"),
+            "bad band version: {:#?}",
+            e_str
+        );
     }
 }

src/live_tree.rs

@@ -397,7 +397,7 @@ mod tests {
 
         let repr = format!("{:?}", &result[6]);
         let re = Regex::new(r#"LiveEntry \{ apath: Apath\("/jam/apricot"\), kind: File, mtime: UnixTime \{ [^)]* \}, size: Some\(8\), symlink_target: None \}"#).unwrap();
-        assert!(re.is_match(&repr), repr);
+        assert!(re.is_match(&repr));
 
         // TODO: Somehow get the stats out of the iterator.
         // assert_eq!(source_iter.stats.directories_visited, 4);