options(knitr.duplicate.label = "allow") is not always taken into account

The dynamic creation of .Rprofile including this instruction during render_report doesn't seem to work every time.

changed milestone to %v0.2.0

added bug label

assigned to @david.dorchies

closed with commit b016901f

mentioned in commit 7855807e

mentioned in commit 67dedf2a

mentioned in commit 68bad796