Better error message

Flag: NONE updating strings
Test: none
Change-Id: I2539dfdbae538cae84fa3cc6ee8457eb1910d4ca
diff --git a/tools/protologtool/src/com/android/protolog/tool/ProtoLogTool.kt b/tools/protologtool/src/com/android/protolog/tool/ProtoLogTool.kt
index 2d5b50b..aa53005 100644
--- a/tools/protologtool/src/com/android/protolog/tool/ProtoLogTool.kt
+++ b/tools/protologtool/src/com/android/protolog/tool/ProtoLogTool.kt
@@ -443,10 +443,10 @@
             val command = CommandOptions(args)
             invoke(command)
         } catch (ex: InvalidCommandException) {
-            println("\n${ex.message}\n")
+            println("InvalidCommandException: \n${ex.message}\n")
             showHelpAndExit()
         } catch (ex: CodeProcessingException) {
-            println("\n${ex.message}\n")
+            println("CodeProcessingException: \n${ex.message}\n")
             exitProcess(1)
         }
     }