mutants: Skip error handling that's really not tested yet

#286

Author: sourcefrog

.cargo/mutants.toml

@@ -5,6 +5,8 @@ exclude_re = [
     "<impl Display",
     # spins forever returning empty vecs
     "replace <impl Iterator for IterStitchedIndexHunks>::next -> Option<Self::Item> with Some\\(Default::default\\(\\)\\)",
+    # finds some real lacking coverage of error handling: https://github.com/sourcefrog/conserve/issues/286
+    "src/blockdir.rs:.*: replace match guard"
 ]
 
 # Include only files that are currently well-tested; most of the others should

src/transport/local.rs

@@ -294,7 +294,7 @@ mod test {
 
         temp.close().unwrap();
     }
-    
+
     #[cfg(unix)]
     #[test]
     fn list_dir_skips_symlinks() {
@@ -303,7 +303,7 @@ mod test {
         let transport = Transport::temp();
         let dir = transport.local_path().unwrap();
         std::os::unix::fs::symlink("foo", dir.join("alink")).unwrap();
-        
+
         let list_dir = transport.list_dir(".").unwrap();
         assert_eq!(list_dir.files, [""; 0]);
         assert_eq!(list_dir.dirs, [""; 0]);