Update table-row-context-example.html

[fileto1]

Fixed comments for each column.

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[fileto1]

@googlebot I signed it!

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[jelbourn]

This one should stay as "Index"

[fileto1]

But already exists the index column, do you can see in the images. Implicity is another column.

[jelbourn]

Ah, I thought that $implicit was index here, but I was mistaken

[jelbourn]

LGTM

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