Inline TruffleRuby.SIMPLE_NAME, this makes it easier to grep

Author: eregon

src/launcher/java/org/truffleruby/launcher/RubyLauncher.java

@@ -102,7 +102,7 @@ protected List<String> preprocessArguments(List<String> args, Map<String, String
             }
 
         } catch (CommandLineException commandLineException) {
-            System.err.println(TruffleRuby.SIMPLE_NAME + ": " + commandLineException.getMessage());
+            System.err.println("truffleruby: " + commandLineException.getMessage());
             if (commandLineException.isUsageError()) {
                 printHelp(System.err);
             }
@@ -171,7 +171,7 @@ protected void printHelp(OptionCategory maxCategory) {
     @Override
     protected AbortException abortUnrecognizedArgument(String argument) {
         throw abortInvalidArgument(argument,
-                TruffleRuby.SIMPLE_NAME + ": invalid option " + argument + "  (Use --help for usage instructions.)");
+                "truffleruby: invalid option " + argument + "  (Use --help for usage instructions.)");
     }
 
     private int runRubyMain(Context.Builder contextBuilder, CommandLineOptions config) {

src/main/java/org/truffleruby/language/backtrace/BacktraceFormatter.java

@@ -102,7 +102,7 @@ public void printRubyExceptionMessageOnEnvStderr(DynamicObject rubyException) {
         } else {
             messageString = message.toString();
         }
-        printer.println(TruffleRuby.SIMPLE_NAME + ": " + messageString);
+        printer.println("truffleruby: " + messageString);
     }
 
     @TruffleBoundary

src/shared/java/org/truffleruby/shared/TruffleRuby.java

@@ -12,7 +12,6 @@
 public class TruffleRuby {
 
     public static final String FORMAL_NAME = "TruffleRuby";
-    public static final String SIMPLE_NAME = "truffleruby";
     public static final String LANGUAGE_ID = "ruby";
     public static final String MIME_TYPE = "application/x-ruby";
     public static final String EXTENSION = ".rb";