Hi,

Indeed this example below no longer works, however I believe the new
behavior is both desired and permanent.  I'll explain and include an
option for how your example could be restructured to work with the new
code.

We ran into problems automatically removing trailing newlines from code
block bodies as in some languages (looking at you Python and Haskell)
things like trailing newlines are of syntactic importance.  In your
example this behavior results in the insertion of newlines after
file-name and file-version.  Babel is careful to preserve line prefixes
when expanding references in comments, so it then reproduces the

  # Generated from 

portion of that line for every line of the expanded noweb references.

I would suggest the following alternatives, either using a data
references in stead of a code block reference as in the file-version
example below, or using an evaluated code block as in the file-name
example below.  Hope this helps.

Best -- Eric