ISSN hyperlink

[Edinbro]

I'm sorry for the 1,307 additions and 1,305 deletions, but the code should work, I tried on a couple of my projects. I haven't tried to find a solution though for the case that there is a comma between two or more ISSNs.

Cheers,
Frederic

[matthieu-vergne]

This is mainly because of changes in the white spaces (space, new line, tab, etc.). If you ignore them, there is really not much:
https://github.com/matthieu-vergne/LaTeX/pull/5/files?diff=unified&w=1

Since there is also a character which is badly encoded in your version, I assume this is because you modified the files with a tool which does a bad job, especially with no management of UTF8 characters. It might be you edited the files with an editor in Microsoft Windows, which may have make a mess of the newline characters, thus making a mess of the whole file.

If you understand what I mean, I would be glad that you fix it.