Must guard against empty node labels
xrotwang opened this issue · comments
File "/home/robert/venvs/ll/lib/python3.10/site-packages/cldfviz/tree.py", line 21, in clean_node_label
s = s.replace(c, '_')
AttributeError: 'NoneType' object has no attribute 'replace'
Lines 19 to 22 in 87e5b38