[SE-0121] remove use of optional comparison operators

[jtbandes]

Found another. These things are out to get me. for apple/swift#3637

[jtbandes]

@parkera Can I bother you for another CI run?

[parkera]

@swift-ci please test

[jtbandes]

@ddunbar Any idea what this failure means? I think it's coming from the package manager:

https://ci.swift.org/job/swift-corelibs-foundation-PR-Linux/142/console

Test Case 'GitRepositoryTests.testProvider' started at 21:21:54.891
Cloning /tmp/spm-tests-testProvider().IEkqjp/test-repo
fatal: Needed a single revision
error: Git 2.0 or higher is required. Please update git and retry

Maybe it's flaky and just running again would fix it?

[ddunbar]

No, it is a real failure which has been reverted.

[moiseev]

@swift-ci please test

[moiseev]

Build failure looks unrelated.
@parkera can we proceed and merge? As this one is blocking apple/swift#3637

[moiseev]

Master builds are failing with the same error.

[moiseev]

@swift-ci Please test and merge

[jtbandes]

@moiseev still seems like a probably unrelated failure?