code style fixes and nesting fixes

src/format/ini.rs

@@ -68,7 +68,7 @@ impl FormatHandler for IniHandler {
             }
         }
         conf.write_to_file(path)
-            .map_err(|e| io::Error::new(io::ErrorKind::Other, e))
+            .map_err(io::Error::other)
     }
 }