Merge topic 'refactor-environment-modification' a5d45e685f Tests: Add case for ENVIRONMENT_MODIFICATION property OP=reset behavior e2854b4fa2 cmCTestRunTest: Implement the ENVIRONMENT test property with EnvDiff too bfa1c5285b cmSystemTools: Add EnvDiff class to hold ENVIRONMENT_MODIFICATION logic a0b1c4ee90 cmCTestRunTest: Simplify by using GetSystemPathlistSeparator 4e6cbb1f13 cmCTestRunTest: Remove unnecessary CMAKE_BOOTSTRAP guard Acked-by: Kitware Robot <kwrobot@kitware.com> Merge-request: !7572