[cmd] Fix typos; add doc

command_line/cadbiom_cmd/solution_sort.py

@@ -414,6 +414,9 @@ def merge_graphs(graphs):
         missing_nodes = set(graph.nodes_iter()) - set(G.nodes_iter())
         if missing_nodes:
             # Add missing nodes in G from the current graph
+            # Note: This step is mandatory even if add_edge() automatically adds
+            # nodes to the graph, because some nodes can be included in any
+            # transition.
             # Build a tuple (node_name, attrs)
             G.add_nodes_from((node, graph.node[node]) for node in missing_nodes)
 

command_line/cadbiom_cmd/tools/graphs.py

@@ -195,7 +195,7 @@ def build_graph(solution, steps, transitions):
 
     # Get & make all needed edges ##############################################
     LOGGER.debug("Build graph for the solution: %s", solution)
-    LOGGER.debug("Decompiled steps: ", steps)
+    LOGGER.debug("Decompiled steps: %s", steps)
 #
 #    print(transitions['_h_2755'])
 #    print(transitions['_h_4716'])