RFR: 8194069: doclint throws missing comment warnings on lines which can't even have javadoc

Thu Jan 4 00:26:53 UTC 2018

Please review a simple update for JDK 10, that fixes a recently reported 
issue, that doclint was reporting spurious errors related to lambda 
expressions.

The fix is simple: ignore lambda expressions when scanning for doc 
comments. In addition, all BlockTree nodes are also ignored, since 
javadoc never analyses declarations within blocks.

The test is lightly edited from the test case provided in the bug report.

Bug: https://bugs.openjdk.java.net/browse/JDK-8194069
Webrev: http://cr.openjdk.java.net/~jjg/8194069/webrev.00/

-- Jon