virsh: improve grammar in error message
virsh: improve grammar in error message

Based on a suggestion from Mauricio Tavares.

* tools/virsh-domain.c (cmdDetachInterface, vshFindDisk): Improve
wording.

Signed-off-by: Eric Blake <a9da18479c871fe903d9590822cfe2629c6a4d11@redhat.com>

rlaager/libvirt,agx/libvirt,agx/libvirt,VenkatDatta/libvirt,elmarco/libvirt,libvirt/libvirt,fabianfreyer/libvirt,rlaager/libvirt,olafhering/libvirt,zippy2/libvirt,shugaoye/libvirt,datto/libvirt,fabianfreyer/libvirt,agx/libvirt,libvirt/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,libvirt/libvirt,olafhering/libvirt,jfehlig/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,crobinso/libvirt,jardasgit/libvirt,crobinso/libvirt,andreabolognani/libvirt,datto/libvirt,nertpinx/libvirt,rlaager/libvirt,shugaoye/libvirt,elmarco/libvirt,eskultety/libvirt,shugaoye/libvirt,datto/libvirt,taget/libvirt,datto/libvirt,libvirt/libvirt,andreabolognani/libvirt,jfehlig/libvirt,nertpinx/libvirt,taget/libvirt,olafhering/libvirt,eskultety/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,agx/libvirt,VenkatDatta/libvirt,taget/libvirt,taget/libvirt,andreabolognani/libvirt,crobinso/libvirt,andreabolognani/libvirt,elmarco/libvirt,zippy2/libvirt,jardasgit/libvirt,nertpinx/libvirt,rlaager/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,rlaager/libvirt,eskultety/libvirt,taget/libvirt,datto/libvirt,jfehlig/libvirt,agx/libvirt,andreabolognani/libvirt,jardasgit/libvirt,elmarco/libvirt,VenkatDatta/libvirt,shugaoye/libvirt,jardasgit/libvirt,olafhering/libvirt,eskultety/libvirt,fabianfreyer/libvirt,crobinso/libvirt,eskultety/libvirt,zippy2/libvirt,elmarco/libvirt,shugaoye/libvirt