[BUG?] org-edit-src-save active in Org-Babel Previewo

[Rick Frankel]

In an babel preview buffer opened with 'org-babel-expand-src-block,
<C-cC-s> ('org-edit-src-save) writes the expanded view back to the org
file, with all the variable expansions, etc.

I may be wrong, but i don't remember this behavior in older versions of
Org, and this has bitten me a couple of times, breaking babel code
blocks with dynamically set variables (:var …).