Explicitly providing free-form extensions does not override fixed-form default extensions

[banana-bred]

I'm building a project with fpm and am using the fpm.toml file as my ford project file for now. Everything is modern free-form Fortran, but I have the ".f" extension which is automatically reserved for fixed-form. I figured that

[extra.ford]
extensions = ["f"]

would be enough instead of renaming my files to a free-form default, but this does nothing to prevent my files from being read as fixed-form. It seems that this is because I did nothing to change the default value of the fixed_extensions list, which overrides my free-form choice. Is this the expected behavior ? This part of my project file now looks like

[extra.ford]
extensions = ["f"]
fixed_extensions = []

which is a very simple fix, but I still find it strange that a default value from another array (fixed_extensions) takes precedence here.

[ZedThree]

Thanks for the bug report @banana-bred! I think this is expected, the way it currently works is that a file is treated as fixed form if its extension appears in fixed_extensions.

I think we could quite easily check if an extension is in both lists and remove it from fixed if it is.