cubicweb-vcsfile #4578973 strip/renumber detection broken [not validated]

prioritynormal
typebug
done in1.17.0
load0.250
load left0.000
closed by#d310126ef44a [repohg] Fix regression from 1.16.0 (closes #4578973)
patch[repohg] Fix regression from 1.16.0 (closes #4578973) [applied]
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