git: openjdk/jdk: 8277536: Use String.blank in jdk.javadoc where applicable

[Jonathan Gibbons]

Changeset: bb50b92b
Author:    Andrey Turbanov <turbanoff at gmail.com>
Committer: Jonathan Gibbons <jjg at openjdk.org>
Date:      2021-12-07 14:54:32 +0000
URL:       https://git.openjdk.java.net/jdk/commit/bb50b92b804839577cee5092a8a62a98b760f0dc

8277536: Use String.blank in jdk.javadoc where applicable

Reviewed-by: jjg

! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/HtmlDocletWriter.java
! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclint/Checker.java