Parsing of `extra-lib-dirs` fails if trailing comma

Describe the bug If the configuration looks like this:

extra-lib-dirs: C:\msys64\clang64\lib,
                C:\Users\Javier\bb\extra,

It will be passed as:

$ cabal build --verbose
...
--extra-lib-dirs=C:\msys64\clang64\lib,
C:\Users\Javier\bb\extra,
...
library-dirs:
C:\Users\Javier\bb\dist-newstyle\build\x86_64-windows\ghc-9.4.8\bb-0.1.0.0\build
"C:\\msys64\\clang64\\lib,\nC:\\Users\\Javier\\bb\\extra,"

If the last comma is removed:

extra-lib-dirs: C:\msys64\clang64\lib,
                C:\Users\Javier\bb\extra

Then it works:

$ cabal build
...
--extra-lib-dirs=C:\msys64\clang64\lib
--extra-lib-dirs=C:\Users\Javier\bb\extra

System information

• Windows 11, MSYS2 CLANG64
• cabal 3.12.1.0 ghc any