'guix refresh openjpeg'
gnu/packages/image.scm:762:13: openjpeg would be upgraded from 2.3.1 to ersion.2.1

I checked the git repository, there are a number of tags reading
'version.2.1' or similar. This allows for version tags 'version2.1' or
'version-2.1' or 'version.2.1' or 'version→2.1'. (still looking for a
repo to test the last one)

-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted