cli: minor cleanup explicitly checking print_output
The print-output knows three modes: NORMAL, PRETTY, TERSE. Never compare whether a mode is != a particular mode. Instead, always explicitly check for the modes for which we enable a particular behavior. The effect is, that we always do something when the mode is set to a particular value. We don't ever do something, if the mode is not set to a particular value. Consistently opt-in is easier to understand.
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