Remove extraneous whitespace from prettyprinter output.
Remove extraneous whitespace from prettyprinter output.

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