[Sebastien Helleu] > dch command requires liburi-perl package to run. > So I think liburi-perl should be in "depends", not "suggests".
No, this is intentional. devscripts has lots of scripts in it, not just dch. Most of devscripts runs very well without liburi-perl. That is why it is Suggests, not Depends. Please read the package description, which explains exactly which "Suggests" packages you should install depending on which scripts you intend to use.
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