diff --git a/nibabel/batteryrunners.py b/nibabel/batteryrunners.py
index 30727f396..860b9b993 100644
--- a/nibabel/batteryrunners.py
+++ b/nibabel/batteryrunners.py
@@ -252,7 +252,7 @@ def __str__(self):
     def message(self):
         """formatted message string, including fix message if present"""
         if self.fix_msg:
-            return '; '.join((self.problem_msg, self.fix_msg))
+            return f'{self.problem_msg}; {self.fix_msg}'
         return self.problem_msg
 
     def log_raise(self, logger, error_level=40):
diff --git a/nibabel/gifti/gifti.py b/nibabel/gifti/gifti.py
index caee7c350..c983a14df 100644
--- a/nibabel/gifti/gifti.py
+++ b/nibabel/gifti/gifti.py
@@ -374,7 +374,7 @@ def _to_xml_element(self):
     def print_summary(self):
         print('Dataspace: ', xform_codes.niistring[self.dataspace])
         print('XFormSpace: ', xform_codes.niistring[self.xformspace])
-        print('Affine Transformation Matrix: \n', self.xform)
+        print('Affine Transformation Matrix:\n', self.xform)
 
 
 def _data_tag_element(dataarray, encoding, dtype, ordering):
diff --git a/nibabel/gifti/tests/test_gifti.py b/nibabel/gifti/tests/test_gifti.py
index 1cead0d92..416faf3c8 100644
--- a/nibabel/gifti/tests/test_gifti.py
+++ b/nibabel/gifti/tests/test_gifti.py
@@ -423,13 +423,14 @@ def test_gifti_coord(capsys):
     gcs.xform = None
     gcs.print_summary()
     captured = capsys.readouterr()
-    assert captured.out == '\n'.join(
-        [
-            'Dataspace:  NIFTI_XFORM_UNKNOWN',
-            'XFormSpace:  NIFTI_XFORM_UNKNOWN',
-            'Affine Transformation Matrix: ',
-            ' None\n',
-        ]
+    assert (
+        captured.out
+        == """\
+Dataspace:  NIFTI_XFORM_UNKNOWN
+XFormSpace:  NIFTI_XFORM_UNKNOWN
+Affine Transformation Matrix:
+ None
+"""
     )
     gcs.to_xml()
 
diff --git a/pyproject.toml b/pyproject.toml
index 0dd49c847..3e2ffa0b4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -119,6 +119,7 @@ select = [
     "B",
     "C4",
     "F",
+    "FLY",
     "FURB",
     "I",
     "PIE",