line spacing is different after rebuilding fonts from Glyphs sources

Hi there,

when rebuilding the FiraCode fonts [1] from their Glyphs source for the Debian package, their vertical line spacing is significantly different from the fonts bundled in the release. Please compare the two screenshots provided in the Debian bug report [2].

I don't know if line spacing is an export option in the Glyhps app of if it is calculated automatically from the sources, but it would probably help to provide a means to manipulate this value somehow.

Thanks,

- Fabian

[1] https://github.com/tonsky/FiraCode
[2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=919721