Kapunahele Wong 0b5b24abd7 docs: edit interpolation doc (#38687)
This commit edits the copy on the interpolation page.
Tightens language, clarifies headers, and streamlines text.
There are no content or code changes.

PR Close #38687
2020-12-01 10:15:00 -08:00
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2020-12-01 10:15:00 -08:00