The RPM changelog contains trailing tabs on the “-” leader lines. The reason is the use of multiple print arguments here:

            print(cl[j], '\n')
 

We should use .. instead to concatenate the strings.

We should add a small downstream test (not in the RPM sources) to check that there are no tab characters (trailing or otherwise) in the RPM changelog, so this issue is not a development-only activity (unlike other patch-git fixes).