Add explanation to uniqueness-error2.l0
Add explanation to uniqueness-error2.l0

mrakgr/futhark,HIPERFIT/futhark,ihc/futhark,diku-dk/futhark,ihc/futhark,ihc/futhark,diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark,mrakgr/futhark,CulpaBS/wbBach,diku-dk/futhark,mrakgr/futhark,diku-dk/futhark,HIPERFIT/futhark