> If the Program specifies a version number of this License which applies to it and "any later version",
I'm no lawyer, but I think the source has to mention that explicitly. So it's not true of ALL gpl projects. In this case though you are right because nano, it appears, specifies it's license as:
> License: GNU General Public License v3 or later
So, while true in this case it's not always true (see Linux kernel license, GPLv2, no upgrade).
Most GPL projects do this. I don't have access to my box, but if you did a search for licenses you'd find many use "or later" (and in fact a lot of code within Linux uses "or later" as well). So practically it's a very common upgrade path. And some people will actually email every contributor to ask to relicense the code.
> If the Program specifies a version number of this License which applies to it and "any later version",
I'm no lawyer, but I think the source has to mention that explicitly. So it's not true of ALL gpl projects. In this case though you are right because nano, it appears, specifies it's license as:
> License: GNU General Public License v3 or later
So, while true in this case it's not always true (see Linux kernel license, GPLv2, no upgrade).