Fix #2034 repl message for .clear when useGlobal=true

lib/repl.js

@@ -712,12 +712,20 @@ function defineDefaultCommands(repl) {
     }
   });
 
+  var clearMessage;
+  if (repl.useGlobal) {
+    clearMessage = 'Alias for .break';
+  } else {
+    clearMessage = 'Break, and also clear the local context';
+  }
   repl.defineCommand('clear', {
-    help: 'Break, and also clear the local context',
+    help: clearMessage,
     action: function() {
-      this.outputStream.write('Clearing context...\n');
       this.bufferedCommand = '';
-      this.resetContext(true);
+      if (!this.useGlobal) {
+        this.outputStream.write('Clearing context...\n');
+        this.resetContext(true);
+      }
       this.displayPrompt();
     }
   });