bug#24076: gnupg [-agent]: when signing [commits], it claims that there is no pinentry - but there is

[Federico Beffa]

Note that installing 'gnupg' doesn't automatically bring in
'pinentry'. For this reason installing 'gnupg' doesn't work out of the
box as a user would expect:

gpg: agent_genkey failed: No pinentry
Key generation failed: No pinentry


Fede