doc: show multisplit in lang ref
doc: show multisplit in lang ref

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