hg: jdk/sandbox: 8234051: doclet crashes if HTML files in module doc-files directories

[chris.hegarty at oracle.com]

Changeset: 78184b74af6e
Author:    jjg
Date:      2019-11-21 13:41 -0800
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/78184b74af6e

8234051: doclet crashes if HTML files in module doc-files directories
Reviewed-by: hannesw

! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/DocFilesHandlerImpl.java
! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/DocFileElement.java
! test/langtools/jdk/javadoc/doclet/testDocFiles/TestDocFiles.java
- test/langtools/jdk/javadoc/doclet/testDocFiles/pkg/Test.java
- test/langtools/jdk/javadoc/doclet/testDocFiles/pkg/doc-files/test.txt