The <strong> tags are clearly an issue with the CMS here; I've seen it in a few other code samples. I don't know if the preview works with them where the final renderer doesn't or if some people thinks they work and aren't previewing what they write, or if the code is being run through a context highlighter that isn't fully compatible with this CMS, or something else. So I knew that should be ignored.
But I still got it wrong. I said the table wouldn't be created. Why? Because I foolishly expect consistency. Most of my development is small-scale, so I usually use SSMS to design my tables and manage my indexes. When you try to create an index > 900bytes in SSMS, it says that indexes can't be over 900 bytes, and won't let you go any further.
So I accept getting this wrong, because I've learned (once again) that Microsoft's GUI tools are NOT consistent with the capabilities of their underlying engines. Maybe the lesson will stick this time...
---below here is a <strong> tag check; please ignore it---
EDIT: the <strong> tag certainly works in forum posts...