obi ls: improved taxonomy list

python/obitools3/commands/ls.pyx

@@ -42,9 +42,12 @@ def run(config):
     else:
         print(repr(input[1]))
     if input[2] == DMS:
-        print("\n### Taxonomies:")
+        taxolist = ["\n### Taxonomies:"]
         for t in Taxonomy.list_taxos(input[0]):
-            print("\t", tostr(t))
+            taxolist.append("\t"+tostr(t))
+        if len(taxolist) > 1:
+            for t in taxolist:
+                print(t)
     if config['ls']['longformat'] and len(input[1].comments) > 0:
         print("\n### Comments:")
         print(str(input[1].comments))