mod package:distribution-opensuse
integer modulus, satisfying
(x `div` y)*y + (x `mod` y) == x
guessChangelog accepts up to 10 lines of unmodified text at
the top of the upstream change log file because some people like to
have a short introduction text there etc. If that header becomes too
large, however, then we return this error because we expect upstream
to add text at the top, not in the middle of the file.