Merge branch 'ab/test-lib-pass-trace2-env'

Allow tracing of Git executable while running the testsuite. * ab/test-lib-pass-trace2-env: test-lib: whitelist GIT_TR2_* in the environment

Junio C Hamano committed Apr 25, 2019 at 16:41 UTC 8baf40b5b463bc6e52b0ef5c5c3d495bb0a920b3

No changes.