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Werk #6665: Checks may now yield the value None as plugin output

ComponentChecks & Agents
TitleChecks may now yield the value None as plugin output
Date2018-10-10 14:34:43
Checkmk EditionCheckmk Raw Edition (CRE)
Checkmk Version1.6.0b1,1.5.0p6
LevelTrivial Change
ClassNew Feature
CompatibilityCompatible - no manual interaction needed

A check usually returns a state, followed by text and optional perfdata. The plugin output was not well formatted, in case yield returned an empty string. It is now possible to yield None as plugin output, which instructs the Check API to ignore this value.