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Eli Schwartz authored
PKGEXT is a makepkg variable referring to a fixed filename suffix, but we were also using it to mean a bash glob referring to candidate filenames. This is wrong, so rename it to PKGEXTS which is more descriptive of its purpose. Exclude the testsuite from this change, as the testsuite actually uses PKGEXT for its intended purpose. Fix the testsuite to consistently use PKGEXT, as it hardcoded the file extension in several cases, and pin its value to .pkg.tar.xz