chore: drop redundant None default on dict.get() (ruff SIM910)

[alexzhu0]

Summary

Ruff rule SIM910 flags d.get(key, None) where the explicit None default is redundant — dict.get() already returns None by default when the key is missing. The replacement is byte-identical. 2 occurrences, both auto-fixable.

-    edge_distances = node_distances.get("RelationType_relationship_name", None)
+    edge_distances = node_distances.get("RelationType_relationship_name")

Semantic equivalence

From the CPython dict.get() docs:

get(key[, default]) — Return the value for key if key is in the dictionary, else default. If default is not given, it defaults to None, so that this method never raises a KeyError.

d.get(k) and d.get(k, None) return identically in every case. No type-hint or call-site contract shifts.

Scope

2 files, 2 sites, +2 / −2.

File	Sites
m_flow/retrieval/episodic/bundle_search.py	1
m_flow/retrieval/utils/fine_grained_triplet_search.py	1

Verification

$ uv run ruff check . --exclude 'm_flow/baml_client' --exclude 'm_flow-frontend' --select SIM910
All checks passed!

$ for f in $(git diff --name-only main); do uv run python -c "import ast; ast.parse(open('$f').read())"; done
# clean across both files

No behavior change. Generated code under m_flow/baml_client/ is untouched.

I affirm that all code in every commit of this pull request conforms to the terms of the M-flow Developer Certificate of Origin