Test test/docs/jdk/javadoc/doccheck/checks/jdkCheckHtml.java report failis when there is no tidy command:

STDERR:
test: test
tidy not found on PATH
Tidy found errors in the generated HTML
Exception running test test: java.lang.Exception: One or more HTML checkers failed: [java.lang.RuntimeException]
java.lang.Exception: One or more HTML checkers failed: [java.lang.RuntimeException]
        at DocCheck.runCheckersSequentially(DocCheck.java:191)
        at DocCheck.test(DocCheck.java:176)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:565)
        at toolbox.TestRunner.runTests(TestRunner.java:91)
        at toolbox.TestRunner.runTests(TestRunner.java:73)
        at DocCheck.main(DocCheck.java:98)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:565)
        at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
        at java.base/java.lang.Thread.run(Thread.java:1474)