Description:
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the chm manual is missing the words heredoc and nowdoc in the index. they are used a lot, so an entry is needed for both.


Test script:
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1. run chm help file
2. click index tab
3. type heredoc
4. replace with nowdoc
5. replace with <<<

Expected result:
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it would be nice to include <<< but I think the microsoft HTML help indexing engine doesn't seem to support < or > characters or most punctuation (unit-test it though).

perhaps you could also list <<< with the string operators? or is that appropriate?


Actual result:
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no entry in index for these 3 items.