Hello Emacs developers,

The inlined patch implements sanitation of single-file package’s long
description which is derived from the package’s commentary header
section.  It removes the commentary header, the double semicolon prefix
of each line, trailing new-lines and trailing white-space.  I think this
is the usual practice for packages in GNU ELPA and MELPA repositories.
Furthermore it’s aligned with the intended behavior for multi-file
packages which is to read the long description from a README file[1] ---
which presumably does not have commentary sections nor double semicolon
prefixes.


Please, let me know of any changes required.
Thanks!


PS: For some reason I was not able to use a single regexp within a
single invocation of ‘replace-regexp-in-string’, as would be natural.
It simply didn’t work as expected.  It’s working fine now with nested
calls.