📚 Description

Files src/sage/graphs/graph_decompositions/bandwidth.pyx and src/sage/graphs/graph_decompositions/cutwidth.pyx were missing the statement cython: binding=True. So these methods were hardly accessible. We add the instruction and provide access in graphs.

📝 Checklist

• The title is concise, informative, and self-explanatory.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation accordingly.

⌛ Dependencies