terminal: prevent renaming to something that exists already
terminal: prevent renaming to something that exists already

jack89129/koding,andrewjcasal/koding,drewsetski/koding,rjeczalik/koding,sinan/koding,acbodine/koding,usirin/koding,gokmen/koding,szkl/koding,mertaytore/koding,rjeczalik/koding,gokmen/koding,szkl/koding,szkl/koding,drewsetski/koding,drewsetski/koding,usirin/koding,gokmen/koding,andrewjcasal/koding,drewsetski/koding,kwagdy/koding-1,acbodine/koding,mertaytore/koding,acbodine/koding,gokmen/koding,usirin/koding,koding/koding,kwagdy/koding-1,kwagdy/koding-1,cihangir/koding,kwagdy/koding-1,szkl/koding,alex-ionochkin/koding,andrewjcasal/koding,rjeczalik/koding,rjeczalik/koding,acbodine/koding,mertaytore/koding,sinan/koding,mertaytore/koding,cihangir/koding,jack89129/koding,cihangir/koding,andrewjcasal/koding,cihangir/koding,drewsetski/koding,rjeczalik/koding,usirin/koding,koding/koding,koding/koding,jack89129/koding,kwagdy/koding-1,alex-ionochkin/koding,cihangir/koding,alex-ionochkin/koding,alex-ionochkin/koding,mertaytore/koding,alex-ionochkin/koding,koding/koding,alex-ionochkin/koding,acbodine/koding,alex-ionochkin/koding,szkl/koding,sinan/koding,cihangir/koding,kwagdy/koding-1,sinan/koding,gokmen/koding,mertaytore/koding,sinan/koding,andrewjcasal/koding,szkl/koding,jack89129/koding,drewsetski/koding,cihangir/koding,koding/koding,cihangir/koding,usirin/koding,acbodine/koding,sinan/koding,gokmen/koding,usirin/koding,szkl/koding,mertaytore/koding,gokmen/koding,jack89129/koding,sinan/koding,jack89129/koding,gokmen/koding,drewsetski/koding,rjeczalik/koding,acbodine/koding,koding/koding,acbodine/koding,andrewjcasal/koding,kwagdy/koding-1,jack89129/koding,koding/koding,rjeczalik/koding,rjeczalik/koding,koding/koding,usirin/koding,jack89129/koding,usirin/koding,kwagdy/koding-1,alex-ionochkin/koding,andrewjcasal/koding,andrewjcasal/koding,mertaytore/koding,szkl/koding,drewsetski/koding,sinan/koding