Merge branch 'sg/trace2-rename'

Dev support update to help tracing out tests. * sg/trace2-rename: trace2: correct typo in technical documentation Revert "test-lib: whitelist GIT_TR2_* in the environment"

Junio C Hamano committed Jul 9, 2019 at 15:25 UTC e9eaaa46906753ca8958df33328a0590b0287166

No changes.