How to deal with typo "2" instead of "2.1" for "GNU Lesser General Public" in headers?

[Friedrich W. H. Kossebau]

Am Sonntag, 4. Januar 2015, 19:03:44 schrieb Friedrich W. H. Kossebau:
> Happy New Year, all,
> 
> though I just made a not too happy discovery:
> there are quite some files in the Calligra codebase which have a somehow
> broken license header which names the "GNU Lesser General Public" in
> "version 2 of the License"...
> which does not exist, there is only 2.1 as minimum version (2 was the
> version of the "Library" variant).
> 
> Seems someone once adapted the header from "GNU Library General Public" to
> "GNU Lesser General Public" but forgot the license number, and then people
> happily copied that header over since ages without noticing. Only a few
> files have a correct "GNU Lesser General Public" header.
> 
> Question:
> can it be assumed (and should we) that all contributors actually agreed to
> the "2.1" version of the "Lesser" given there is no "2" version?
> Especially as at least all files I checked also contain "or (at your option)
> any later version.", where "2.1" would be a theoretical later version of
> "2"?
> 
> To be on the really safe side I guess one would need to get all contributors
> explicitely agree to the correct version. But pragmatically I would just
> assume people very much were in agreement with 2.1, and this can be
> considered just a typo.
> 
> So would anyone strongly advise against simply applying a patch to all those
> license headers and change the "2" to "2.1"?

Seems noone does, and everyone agrees it can be considered a typo. So will 
prepare a patch as review request tomorrow which fixes that typo.

Cheers
Friedrich