diff --git a/tracetools_analysis/tracetools_analysis/data_model/profile.py b/tracetools_analysis/tracetools_analysis/data_model/profile.py
index aa30b34..00deb64 100644
--- a/tracetools_analysis/tracetools_analysis/data_model/profile.py
+++ b/tracetools_analysis/tracetools_analysis/data_model/profile.py
@@ -21,7 +21,7 @@ from . import DataModel
 
 class ProfileDataModel(DataModel):
     """Container to model pre-processed profiling data for analysis."""
-    
+
     def __init__(self) -> None:
         """Constructor."""
         self.times = pd.DataFrame(columns=[
diff --git a/tracetools_analysis/tracetools_analysis/processor/profile.py b/tracetools_analysis/tracetools_analysis/processor/profile.py
index da45b91..be04b45 100644
--- a/tracetools_analysis/tracetools_analysis/processor/profile.py
+++ b/tracetools_analysis/tracetools_analysis/processor/profile.py
@@ -63,7 +63,7 @@ class ProfileProcessor(EventHandler):
         self.functions = functions
 
         # Temporary buffers
-        # tid -> 
+        # tid ->
         #   (list of functions currently executing (ordered by relative depth),
         #    start timestamp of the function)
         self._current_funcs: Dict[int, List[Tuple[str, int]]] = defaultdict(list)