config/log.yml in betterlog-0.8.1 vs config/log.yml in betterlog-0.9.0

@@ -13,10 +13,10 @@
     default: &default_format >
       {%lt%timestamp} {%5s%severity}
       "{%0.<%= ENV.fetch('COLUMNS', 80).to_i / 2 %>%message}"
       {host}
       {location}
-      {file}{-%O%backtrace}{-%O%meta}
+      {file}{-%O%error_class}{-%O%backtrace}{-%O%meta}
     d: *default_format
     long: &long_format |
       timestamp: {%lt%timestamp}
       severity: {severity}
       message: "{message}"