Fix one more [/] in env-var test for windows
Fix one more [/] in env-var test for windows

achanda/cargo,rustyhorde/cargo,sbeckeriv/cargo,rust-lang/cargo,tsurai/cargo,achanda/cargo,sbeckeriv/cargo,durka/cargo,vojtechkral/cargo,nipunn1313/cargo,sbeckeriv/cargo,eminence/cargo,tsurai/cargo,tshepang/cargo,durka/cargo,sbeckeriv/cargo,rustyhorde/cargo,vojtechkral/cargo,tsurai/cargo,nipunn1313/cargo,durka/cargo,eminence/cargo,tshepang/cargo,tshepang/cargo,tshepang/cargo,rustyhorde/cargo,vojtechkral/cargo,nipunn1313/cargo,nipunn1313/cargo,tsurai/cargo,rust-lang/cargo,rust-lang/cargo,rust-lang/cargo,tsurai/cargo,achanda/cargo,durka/cargo,eminence/cargo,achanda/cargo,eminence/cargo,rustyhorde/cargo,vojtechkral/cargo