Fix NameError by adding ::operator

[ninoseki]

Description

Closes #3117 by adding :: operator.

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[MSP-Greg]

Verified bug as shown in #3117 with Ubuntu 22.04, Ruby master/head, Puma master.

EDIT:

@ninoseki - Thank you for the PR and the example in #3117. I knew there have been changes re top-level constants, but not the kind of change shown here...

[dentarg]

We must be missing a test case?

[MSP-Greg]

@dentarg

Good idea. See #3119. Fails if this is reverted, as below:

  1) Error:
TestRackUp::TestOnBootedHandler#test_on_booted:
NameError: uninitialized constant Puma::Rack::CommonLogger
    /mnt/c/Greg/GitHub/puma/lib/rack/handler/puma.rb:35:in `block in config'
    /mnt/c/Greg/GitHub/puma/lib/puma/configuration.rb:195:in `configure'
    /mnt/c/Greg/GitHub/puma/lib/puma/configuration.rb:188:in `initialize'

[dentarg]

Excellent, thanks for that @MSP-Greg ❤️