Werk #12116: Fix default formatting for predictive levels

Component	Checks & agents
Title	Fix default formatting for predictive levels
Date	Feb 11, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 2.0.0b7 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

In some cases it was possible that the result summary of a predictive level check contained '%.2f' instead of the measured value. Now the measured value should be displayed correctly.

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