HTML open tags are highlighted in comment blocks, close tags are not

[ferdnyc]

Possibly as a consequence of the fix for #32, HTML tags in comment blocks will only have their open tags syntax-highlighted, not the corresponding close tags. See for example the comment block at the start of SparseBitSet/src/main/java/com/zaxxer/sparsebits/SparseBitSet.java from SparseBitSet by @brettwooldridge :

https://github.com/ferdnyc/bug-testing/blob/3fbf00b8a856e54bf8374c8bae72b3346501f9bb/SparseBitSet.java#L12-L21