diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7c6cccb6c..060016b0c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -67,7 +67,7 @@ repos:
 
       - id: no-commit-to-branch
         name: 'The commit is not being made to the main branch'
-        args: [--branch, main, --branch, master]
+        args: [--branch, main]
 
       - id: check-merge-conflict
         name: "Files are free of git merge conflict strings"
diff --git a/.pylintrc b/.pylintrc
index 1aba3674d..d3e4bd87a 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -998,7 +998,7 @@ callbacks=cb_,
 
 # A regular expression matching the name of placeholder variables (i.e. expected to
 # not be used).
-dummy-variables-rgx=_+$|(_[a-zA-Z0-9_]*[a-zA-Z0-9]+?$)|dummy|^ignored_|^unused_
+dummy-variables-rgx=_+$|(_[a-zA-Z0-9_]*[a-zA-Z0-9]+?$)|^ignored_|^unused_|^placeholder_?
 
 # Argument names that match this expression will be ignored.
 ignored-argument-names=_.*|^ignored_|^unused_
diff --git a/conftest.py b/conftest.py
index 080bcba9d..b14b0ef05 100644
--- a/conftest.py
+++ b/conftest.py
@@ -61,7 +61,7 @@ def set_threadpool_limits():
     if "PYTEST_XDIST_WORKER_COUNT" in os.environ:
         from openfermion.config import get_available_cpu_count
 
-        # Limit native library thread pools for this worker.
+        # Limit compiled library thread pools for this worker.
         with threadpoolctl.threadpool_limits(limits=get_available_cpu_count()):
             yield
     else:
diff --git a/src/openfermion/ops/operators/binary_code.py b/src/openfermion/ops/operators/binary_code.py
index 14eb48764..bd099f05b 100644
--- a/src/openfermion/ops/operators/binary_code.py
+++ b/src/openfermion/ops/operators/binary_code.py
@@ -300,10 +300,10 @@ def __rmul__(self, factor):
     def __str__(self):
         """Return an easy-to-read string representation."""
 
-        def convert_to_native(value):
+        def to_python_type(value):
             return getattr(value, "tolist", lambda: value)()
 
-        string_return = [list(map(list, convert_to_native(self.encoder.toarray())))]
+        string_return = [list(map(list, to_python_type(self.encoder.toarray())))]
 
         dec_str = '['
         for term in self.decoder: