Fixes

• Shell escaping support has been improved to handle more complex cases
• %patchNNN macros work, just as %patch -P NNN does
• Fix processing of Requires(pre) and Requires(preun) for subpackages
• Process Supplements in subpackages
• Overriding OS macros works as intended now

Features

• New %__sed_i macro for using sed with inline replacement
• Requires(post) and Requires(postun) now are processed and map to Depends
• Native support for unpacking Ruby Gem (.gem) archives

Packaging

• Switch from pax to spax for /usr/bin/pax to make installable on EL8