I think there was a semi-official stance on this. The documentation indicates that pkgrel is to be bumped for updates. If your change is not meant for an update the user wants to see, then there is obviously no need for a pkgrel bump.
- [aur-general] Incrementing pkgrel Nicola Fontana
- Re: [aur-general] Incrementing pkgrel Smartboy
- Re: [aur-general] Incrementing pkgrel Nicola Fontana
- Re: [aur-general] Incrementing pkgrel Heiko Baums
- Re: [aur-general] Incrementing pkgrel Smartboy
- Re: [aur-general] Incrementing pkgrel Lukáš Jirkovský
- Re: [aur-general] Incrementing pk... Ray Rashif
- Re: [aur-general] Incrementing pkgrel Nicola Fontana
- Re: [aur-general] Incrementing pkgrel Biru Ionut
