Fix bug in non-varying linewidth plot of single linkage tree
Fix bug in non-varying linewidth plot of single linkage tree

brunoalano/hdbscan,brunoalano/hdbscan,c-north/hdbscan,scikit-learn-contrib/hdbscan,scikit-learn-contrib/hdbscan,lmcinnes/hdbscan,lmcinnes/hdbscan