Bug 144988 [WorkspaceLauncher] Disallow space as workspace name
In Windows, when I launch Eclipse 3.2, a workspace window box is launched. I was able to specify simply the space character as the workspace path. It wasn't allow in Eclipse 3.1.2
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/ChooseWorkspaceDialog.java
createShowDialogButton(composite);
		}
        Dialog.applyDialogFont(composite);
        return composite;
    }
    /**
     * Configures the given shell in preparation for opening this window
     * in it.
     * <p>
     * The default implementation of this framework method
     * sets the shell's image and gives it a grid layout. 
     * Subclasses may extend or reimplement.
     * </p>
     * 
     * @param shell the shell
     */
    protected void configureShell(Shell shell) {
        super.configureShell(shell);
        shell.setText(IDEWorkbenchMessages.ChooseWorkspaceDialog_dialogName);
    }
    /**
     * Notifies that the ok button of this dialog has been pressed.
     * <p>
     * The <code>Dialog</code> implementation of this framework method sets
     * this dialog's return code to <code>Window.OK</code>
     * and closes the dialog. Subclasses may override.
     * </p>
     */
    protected void okPressed() {
        launchData.workspaceSelected(text.getText());