RFR: JDK-8227923: End position of EndElementTree is -1

[Jan Lahoda]

Hi,

The end position of some DocTrees (namely EndElementTree, EntityTree and 
CommentTree) is reported as -1 from 
DocTrees.getEndPosition(CompilationUnitTree, DocCommentTree, DocTree)

For EntityTree and CommentTree, the end position can be currently 
computed easily. For EndElementTree, the proposal is to record the end 
position during parsing, as is done for the corresponding StartElementTree.

Proposed webrev: http://cr.openjdk.java.net/~jlahoda/8227923/webrev.00/
JBS: https://bugs.openjdk.java.net/browse/JDK-8227923

How does this look?

Thanks,
     Jan