use correct visible length

diff --git a/python/educational-core/student/src/com/jetbrains/edu/learning/courseFormat/AnswerPlaceholder.java b/python/educational-core/student/src/com/jetbrains/edu/learning/courseFormat/AnswerPlaceholder.java
index ff6ea8f7b7580838a80d28a40707ab86d7da2f2c..d952d934c793aa2c85d59f783f26a05d6c2c6cb3 100644 (file)
--- a/python/educational-core/student/src/com/jetbrains/edu/learning/courseFormat/AnswerPlaceholder.java
+++ b/python/educational-core/student/src/com/jetbrains/edu/learning/courseFormat/AnswerPlaceholder.java
@@ -241,7 +241,7 @@ public class AnswerPlaceholder {
     if (minIndex > subtaskIndex) {
       return minInfo.isNeedInsertText() ? 0 : minInfo.getPlaceholderText().length();
     }
     if (minIndex > subtaskIndex) {
       return minInfo.isNeedInsertText() ? 0 : minInfo.getPlaceholderText().length();
     }

-    int maxIndex = Collections.max(ContainerUtil.filter(mySubtaskInfos.keySet(), i -> i < subtaskIndex));
+    int maxIndex = Collections.max(ContainerUtil.filter(mySubtaskInfos.keySet(), i -> i <= subtaskIndex));

     return getUseLength() ? length : mySubtaskInfos.get(maxIndex).getPossibleAnswer().length();
   }
 
     return getUseLength() ? length : mySubtaskInfos.get(maxIndex).getPossibleAnswer().length();
   }