Describe the bug

igraph_bigraphical() has an option for self-loops, and states:

The bipartite graph may or may not have multiple and loop edges, depending on the allowed edge types in the remaining arguments.

This is incorrect. Bipartite graphs cannot have loop edges by definition. The docs should be changed and the loops argument removed.

https://python.igraph.org/en/stable/api/index.html#is_bigraphical

Version information
0.11.2