Test for issue #542.
Apparent fix for issue #542.
Change test name for "li in li after enter" test.
Improve tests for "li in li after enter" tests and make them skip.
Changelog entry for #542.
Issue #542: Code comments warn that unit tests are skipped.
`.nodeAfterSel` returns null instead of throwing.
`WymClassWebKit._isLiInLiAfterEnter`: Fixes.

apparently, null is of type object.
Merge branch 'master' into issue_542

Conflicts:
	CHANGELOG.md
"li in li after enter" test: Make broken HTML valid.
"li in li after enter" test: Perhaps a better way to skip the test.
"li in li after enter" tests: separate to individual tests.
Issue #542: Fix the tests.
Typo.
Issue #542: Removed comments that are saying that tests are skipped.
Merge pull request #542 from wymeditor/issue_542

Fixes #542. WebKit/Blink can create `li` in `li`