GWT材料:元素中的意外文本:"??"

Question

从gwt-material的github演示(gwt-material-demo)复制代码,你可以在编译时收到这个奇怪的错误:

[ERROR] 12477 [main] INFO org.jboss.errai.enterprise.rebind.NonGwtEventQualifierSerializerGenerator - Successfully loaded org.jboss.errai.cdi.EventQualifierSerializerImpl
[INFO]    Computing all possible rebind results for '[my_packages].Binder'
[INFO]       Rebinding [my_packages].Binder
[INFO]          Invoking generator com.google.gwt.uibinder.rebind.UiBinderGenerator
[INFO]             [ERROR] Unexpected text in element: "? ?": <m:MaterialRow> (:21)

这是由于一些奇怪的不可见字符,如下图所示:

删除它们,一切都很好.

再见尼古拉