Fix typo in error message

[Refactor][Toolbox]

org.lamport.tla.toolbox/src/org/lamport/tla/toolbox/ui/wizard/NewSpecWizardPage.java

@@ -28,7 +28,6 @@ import org.lamport.tla.toolbox.util.UIHelper;
  * A wizard page input of the specification name and the location of the root file
  * 
  * @author Simon Zambrovski
- * @version $Id$
  */
 public class NewSpecWizardPage extends WizardPage
 {
@@ -297,7 +296,7 @@ public class NewSpecWizardPage extends WizardPage
                 Spec existingSpec = Activator.getSpecManager().getSpecByName(specName);
                 if (existingSpec != null)
                 {
-                    reportError("The specification with provided name is already exists \nand uses "
+                    reportError("The specification with provided name already exists \nand uses "
                             + existingSpec.getRootFilename() + " as root module.");
                     return;
                 }