Disjointsets comment typo fixes
Disjointsets comment typo fixes

inviwo/inviwo,Sparkier/inviwo,Sparkier/inviwo,Sparkier/inviwo,inviwo/inviwo,Sparkier/inviwo,inviwo/inviwo,Sparkier/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo