Update fallback strings

Author: grega

copydecks/en/copydeck.json

@@ -11,9 +11,9 @@
     "error": "Error",
     "copydeckNotLoaded": "Copydeck not loaded",
     "pythonError": "Python error",
-    "fallbackSummary": "Start with the last line of the message and the highlighted code line.",
-    "fallbackWhy": "The last line of the traceback tells you the error type and main cause.",
-    "fallbackStep": "Fix one small thing and run again."
+    "fallbackSummary": "Start with the last line of the trace (message) and the highlighted code line.",
+    "fallbackWhy": "The last line of the trace tells you the error type and main cause.",
+    "fallbackStep": "Try a fix and run again."
   },
   "glossary": {
     "kid": {