gd: Fix documentation comment
gd: Fix documentation comment

pwithnall/libgdata,Pecisk/libgdata,Distrotech/libgdata,Pecisk/libgdata,pwithnall/libgdata,Pecisk/libgdata-gtasks,Pecisk/libgdata-gtasks,Distrotech/libgdata,Distrotech/libgdata,Pecisk/libgdata,Pecisk/libgdata-gtasks,GNOME/libgdata