Log Message:
ruby-rouge: update to 3.15.0.

ChangeLog:

This release includes three new lexers: FreeFEM, GHC and Objective-C++.
Thanks to contributions from the community, we also have fixes for the
Console, Jinja, LLVM, Python, Rust and Swift lexers. Finally, you should
now be able to pass 'false' as an option after a fix to how CGI-style
options are parsed.