[rubygems/rubygems] Fix Gem::Specification#gem_dir losing custom source for some reason
Gem::Specification#gem_dir
https://github.com/rubygems/rubygems/commit/f8f589b1b8
[rubygems/rubygems] Fix
Gem::Specification#gem_dirlosing custom source for some reasonhttps://github.com/rubygems/rubygems/commit/f8f589b1b8