If you eliminate the "1:", you get:
& 1) appears newer than 2).
What is the context? -- OS etc.
Are these full
filenames, including extension?
Especially are they .rpm's, .deb's, or perhaps something else?
I believe I used to see such "n
:" artifacts in Debian distro (e.g. MEPIS, *buntu, etc.) packages, where the "n
:" was obviously not part of the upstream version number. I don't think I ever figured out what they meant, I just learned to ignore them. I can't quickly find any today.