更新文本撤回提示信息

src/main/java/net/micode/notes/ui/NoteEditActivity.java

@@ -1096,7 +1096,7 @@ public class NoteEditActivity extends Activity //NOTE: extends--单继承，但
         });
         mIsRvoke = true;
         if(mHistory.size() <= 1){
-            dialog.setMessage(R.string.have_not_input_anything);
+            dialog.setMessage(R.string.cannot_revoke_anything);
             dialog.show();
         }
         else {

src/main/res/values/strings.xml

@@ -70,7 +70,7 @@
     <string name="menu_alert">Remind me</string>
     <string name="menu_revoke" translatable="false">Revoke text</string>
     <string name="tips_of_revoke" translatable="false">Tip</string>
-    <string name="have_not_input_anything" translatable="false">You haven not input anything</string>
+    <string name="cannot_revoke_anything" translatable="false">You cannot revoke anything</string>
     <string name="menu_screenshot" translatable="false">Screenshot</string>
     <string name="menu_remove_remind">Delete reminder</string>
     <string name="menu_title_select_folder">Select folder</string>