test: net: lib: prometheus: formatter: Fix test flakiness #80845
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If a string is already present in the provided buffer, prometheus_format_exposition() appends it instead of overwriting, hence the buffer needs to be cleared on the test start, otherwise it works by chance. Signed-off-by: Robert Lubos <[email protected]>
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If a string is already present in the provided buffer, prometheus_format_exposition() appends it instead of overwriting, hence the buffer needs to be cleared on the test start, otherwise it works by chance.
Fixes #80827